Develop Bugs

[INFO]32GB MicroSDHC Class 4 card VS File Allocation Unit Size

Before reading:
http://forum.xda-developers.com/showthread.php?t=1150369
I used a Lexar Class 10 32GB card, pretty impressed with its sequential accessing speed but really disappointed when the card performed exactly the same in random accessing speed as shown in the thread.
I've been using it for about 4 months, over these months, it has corrupted 7 times due to rapid random access while updating apps, and the phone loses response during app update.
So few days ago I ordered Sandisk 32GB class 4, using CrystalDiskMark, I conducted a test of file allocation unit size VS performance, please refer to the attached file.
I'm currently using it with 8KB file allocation unit size.
I hope this is gonna help some people regard formatting their SD cards
My Lexar 32GB class 10 still works fine, just the random access speed is too slow, the sequential access speed is excellent, perhaps it will be more suitable for a camera or video camera, if you're interested in getting this used card, please PM me.

SD Card Speed Postings! Participation wanted!

ok I see a lot of quadrant scores and stuff here .. which is great and all .. but I would like to see what everyone is using as far as their sd card goes. This will help others who see this choose an sd card that is proven to be effective here .. a reliable source to say.
I would like:
1) Brand, Size of card, and Class rating
2) Price and where it was purchased at
3) what you think of the card
4) a screen shot of the speeds .. I used SD Tools (free and it lets you save a screenshot)
so here is mine:
1)OEM systems 32GB class 10
2) $57.25 on amazon http://www.amazon.com/OEM-microSD-m...4AJO/ref=sr_1_2?ie=UTF8&qid=1320822033&sr=8-2
3) I really havent decided if I like this card or not .. when I run the benchmarks in my class 10 8gb card from sandisk the speeds are much better (15mb write to 8mb write now). I dont know if I can tell a difference in the performance of the phone ... maybe a little loading pictures in my album... but I also have my Nikon DSLR 7000 full size photos on there as well .. so its to be expected i guess.
4)
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

im getting
write: 9.8 mb/s
read: 23.4 mb/s
im using the new Samsung 32gb class 10 cards
Im very happy with these speeds, i bought the card from Buy.com
shipped out for around 75$

alleyezondisromo said:
im getting
write: 9.8 mb/s
read: 23.4 mb/s
im using the new Samsung 32gb class 10 cards
Im very happy with these speeds, i bought the card from Buy.com
shipped out for around 75$
Click to expand...
Click to collapse
Thanks for the reply .. Wish I would have seen that one ... Sounds a bit better than what I have. Which is why I made this thread .. To help others out.
Sent from my SGH-T989 using xda premium

ADATA 32GB Class 10 $70 local shops
ADATA 16GB Class 6
Transcend 16GB Class 6
Kingston 8GB Class 4
Transcend 2GB Class 6
Generic 4GB Class 6
Sandisk 64GB Class 6? (they don't really advertise the speed) $220 from Sandisk website
SGH-T989 internal onboard SD, appears to be Class 10, it appears to have internal cache, look at that read speed

I have no clue what brand my card is as its old tho my results are..
Write: 9.2 MB/s
Read: 20.1 MB/s
8gb card

Have a Patriot 32gb class 4 and via sd tools I'm getting write = 5.1 MB/s, read = 15.6 MB/s. Not sure if this is good or bad given the class 4 rating compared to others.
With a little speed tweak in place;

rudiepoo1 said:
Have a Patriot 32gb class 4 and via sd tools I'm getting write = 5.1 MB/s, read = 15.6 MB/s. Not sure if this is good or bad given the class 4 rating compared to others.
Click to expand...
Click to collapse
if the write speed is ABOVE the class number, then it means you got a good card
in your case it was rated Class 4, so it supposed to guarantee a minimum of 4 MB/s write to the SD card
and your score shows 5 MB/s that means it's good, and not a fake counterfeit or defective unit, which might have shown 2 MB/s
even on the oldest of my phones like the Treo650 it was able to easily write above Class 6 speeds

AllGamer said:
if the write speed is ABOVE the class number, then it means you got a good card
in your case it was rated Class 4, so it supposed to guarantee a minimum of 4 MB/s write to the SD card
and your score shows 5 MB/s that means it's good, and not a fake counterfeit or defective unit, which might have shown 2 MB/s
even on the oldest of my phones like the Treo650 it was able to easily write above Class 6 speeds
Click to expand...
Click to collapse
Thanks, I know there's somewhat faster cards out there but seems fine for my intended uses such as photos, music, videos, etc. Is there any merit to the SD speed tweak apps I've seen on the market?

Lol wow ... I'm using the mobile app and I thought my thread got deleted .. But just saw it on the sticky side!
Allgamer ... Lol wow nice contribution there!
Thanks to the others for the replies a well!
Oh and if a card has been put here already ... Still post yours. A result is good but multiples shows consistency... Or lack of.
Sent from my SGH-T989 using xda premium

San Disk Class 4 32gb. I got it for 28 bucks.

yay! fun time... BRB let me run some tests
ADATA 32GB Class 10 $70 local shops
Click to expand...
Click to collapse
what do you think about ADATA cards? Do you like them ... had any issues at all? that one looks really good to me and I dont know much about them.

SanDisk class 2 16 gig card I got at best buy for freed using their print out coupons. The price was on sale 1 year ago $24
Sent from my SGH-T989 using xda premium

Strapt said:
what do you think about ADATA cards? Do you like them ... had any issues at all? that one looks really good to me and I dont know much about them.
Click to expand...
Click to collapse
i've been using them for many years already, so they are safe
they offer life time warranty, however it takes a bit of work for them to replace your dead cards

Patriot 32Gb Class 10
Originally bought this card maybe one week after it was released, approx one year ago. Bought it on Amazon for approx $105. Recently totally crashed and could NOT be formatted. I did have off and on weird issues with SD card not recognized, and basically had to reformat. Was running the card in Nexus one, as well as the Sensation 4G. Patriot did an RMA on the card and the replacement runs twice as fast as the original. I think my first card had some weird bugs. Glad it died off. Patriot did honor their unconditional 5 year warranty BTW. I typically get 10MB/s write speed when copying ROMs over from my PC over USB. I used to get only 3Mb's at best with the original card. Using BeastMod II v2.1 ROM.
Edit:
http://forum.xda-developers.com/showthread.php?t=1010807 go to this thread and it describes how changing the cache settings can alter read speeds. I seem to get better results using 4096 setting, while I used to use 1024 setting on my Nexus one. Best to test settings for yourself. My read speeds increased to a consistent 21.0MB/s. Write speeds were anywhere from 9.0 to 10. The cache settings only affect the read speeds, BTW as far as I know.

TopRam from Amazon
16GB Class 10 for $24.99, and it comes with a reader. I have been using it for 2 weeks with no issues. Unfortunately, since I'm new here, I cannot post a link to it. But search for TOPRAM 16 on Amazon and you will get lots of hits… This one was from Midwest Memory Outlet... the one with the red reader
Here are some test pix

Docmjldds said:
Edit:
http://forum.xda-developers.com/showthread.php?t=1010807 go to this thread and it describes how changing the cache settings can alter read speeds. I seem to get better results using 4096 setting, while I used to use 1024 setting on my Nexus one. Best to test settings for yourself. My read speeds increased to a consistent 21.0MB/s. Write speeds were anywhere from 9.0 to 10. The cache settings only affect the read speeds, BTW as far as I know.
Click to expand...
Click to collapse
yes, the cache only works for read, and it doesn't improve it by much on fast phone like ours, is good for older phones that were Sub 1 Ghz
as for your writing speed, it did not even reach the minimum guaranteed of 10 MB/s
you are only getting 9 MB/s write on both test
Yet another reason why i do not trust that brand Patriot

benegessrit said:
TopRam from Amazon
16GB Class 10 for $24.99, and it comes with a reader. I have been using it for 2 weeks with no issues. Unfortunately, since I'm new here, I cannot post a link to it.
Click to expand...
Click to collapse
no need for links, we are not trying to advertise the vendors
our goal here is to show which SD cards are good and which are not

just updated my list a few message above http://forum.xda-developers.com/showpost.php?p=19196376&postcount=4

10.4 MB/s Write
21.2 MB/s Read
Lexar Media
32GB microSDHC class 10
Manufacturer Part# LSDMI32GBSBNAR
From Provantage $59.69
I ran this test 10 times and each time the speed was consistent. I like the quality and reliability of this companies cards. Consistently fast and never had any issues. I also use a Lexar sdcard for my Nikon camera.

how about sharing a screenshot of the test?
after all that's what this topic is for
weird, it seems like due your low post count it wont show your IMG
here it's for those that can't see it
rollingjoe said:
10.4 MB/s Write
21.2 MB/s Read
Lexar Media
32GB microSDHC class 10
Manufacturer Part# LSDMI32GBSBNAR
From Provantage $59.69
I ran this test 10 times and each time the speed was consistent. I like the quality and reliability of this companies cards. Consistently fast and never had any issues. I also use a Lexar sdcard for my Nikon camera.
Click to expand...
Click to collapse

Crappy MicroSD Card -_-

Now here's a question for all of you:
What is the MicroSD Card that is included with your phone? I know it's a 16GB, but does yours have a company branded on it, and also what class is your SD card?
The reason I ask this is because I want to know if they switched the SD Card on my phone with a crappy one and took the good one just before I picked it up. The SD card that came with my phone is just a plain generic Class 2 card. CLASS 2!! It doesn't even have where it is made at. I'm thinking, are you serious?!?! The transfer rate is so horrible, averaging only at 1.5MBps. Takes me over 30 minutes to transfer about one 1GB of files.
My friend who got the rezound at least got a Class 4 card, even though it's generic and made in Taiwan. But his transfer rate is averaging at 15MBps.
So I just wanna double check with all of you and make sure we all have the same type of SD card.
p.s. Also, this could be the reason why the phone sometimes perform sluggishly. I have a feeling when it pulls anything from the SD Card, may it be a large app, music or videos etc, it will have to wait to read from it.
OH! could this be the MAIN reason behind the slow response when taking pictures? I read that this phone has a horrible camera speed, but it might be due to the SD Card being slow and can only write at very low speed to the card.

I also noticed the slow performance of the included micro sd card, and I can't even access it from my card reader, but only through the phone's "mass storage" mode. Anyway just ordered a Sandisk class 4 32GB card from amazon...

The default card that came with mine is a Class 4 8GB made by Kingston. It doesn't say Kingston on it, but I have an actual Kingston SD card to compare it to.

aquariuz23 said:
Now here's a question for all of you:
What is the MicroSD Card that is included with your phone? I know it's a 16GB, but does yours have a company branded on it, and also what class is your SD card?
The reason I ask this is because I want to know if they switched the SD Card on my phone with a crappy one and took the good one just before I picked it up. The SD card that came with my phone is just a plain generic Class 2 card. CLASS 2!! It doesn't even have where it is made at. I'm thinking, are you serious?!?! The transfer rate is so horrible, averaging only at 1.5MBps. Takes me over 30 minutes to transfer about one 1GB of files.
My friend who got the rezound at least got a Class 4 card, even though it's generic and made in Taiwan. But his transfer rate is averaging at 15MBps.
So I just wanna double check with all of you and make sure we all have the same type of SD card.
p.s. Also, this could be the reason why the phone sometimes perform sluggishly. I have a feeling when it pulls anything from the SD Card, may it be a large app, music or videos etc, it will have to wait to read from it.
OH! could this be the MAIN reason behind the slow response when taking pictures? I read that this phone has a horrible camera speed, but it might be due to the SD Card being slow and can only write at very low speed to the card.
Click to expand...
Click to collapse
If that's the default save spot, then yes, that could possibly be the issue. How big are the pictures?

LiViD said:
The default card that came with mine is a Class 4 8GB made by Kingston. It doesn't say Kingston on it, but I have an actual Kingston SD card to compare it to.
Click to expand...
Click to collapse
8GB class 4?? wow that is small in size, although it is a class 4 card. Livid, is it because you are on Bell? Could this be carrier related? Also, how is your camera? Is it having that speed issue in between pictures?
bmxant said:
If that's the default save spot, then yes, that could possibly be the issue. How big are the pictures?
Click to expand...
Click to collapse
bmxant, I took some pics and at full res, they average at around 1.3-1.5 MB, which is just right there with the speed, giving it a second or 2 delay in storing/saving them onto the sd card.

Sandisk Class4 16gb in mine. Mine was ordered and sent directly from AT&T site...I'm leaning toward them swapping out the card on yours.

If you're only writing at 1.5Mb's, that would definitely cause an extra second of lag. Would be nice if we could see a comparison between the Class 2 SD card vs Class 4.
How much cheaper could they get? It's bad enough the phone has 4GB of internal storage. They should of included either a 32GB Class 2, or 16GB Class 4.
Edit: Just read Namuna's post. Why would they swap out the card?

Namuna said:
Sandisk Class4 16gb in mine. Mine was ordered and sent directly from AT&T site...I'm leaning toward them swapping out the card on yours.
Click to expand...
Click to collapse
Alright thanks, I just need some more confirmations and I can visit the store again and confront them with it. I will make them open a fresh box in front of me and check it, unless of course they've swapped all in that store lol!

@aquariuz23: It probably is carrier related. You guys got double on the SD storage and RAM storage versus what we got. I feel a little screwed in that regard, but meh.
For photo taking, it only took one second to snap the picture and store it on the card. The gallery took 5 seconds to read 84 pictures that were stored on the SD card.

LiViD said:
@aquariuz23: It probably is carrier related. You guys got double on the SD storage and RAM storage versus what we got. I feel a little screwed in that regard, but meh.
For photo taking, it only took one second to snap the picture and store it on the card. The gallery took 5 seconds to read 84 pictures that were stored on the SD card.
Click to expand...
Click to collapse
That sounds pretty good, what does Antutu say your write speed is?

Topram Class6 16GB here. SD Tools report 18.5MB/sec read and 5.5MB/sec write, which is pretty accurate for C6. (btw, card manufactured in 2009)
This phone I bought used, can't confirm the card is the original.

6.3 MB/s write and 13 MB/s read. It's about average for a Class 4 SD card.

what do u guys use to test the read/writes of the sd card? I wanna do a test on mine as well.

aquariuz23 said:
what do u guys use to test the read/writes of the sd card? I wanna do a test on mine as well.
Click to expand...
Click to collapse
I always used Antutu

Tested with SD Tools

http://www.amazon.com/KOMPUTERBAY-C...&s=electronics&ie=UTF8&qid=1325197909&sr=1-11
Think this is worth it?

I am getting an average of 2.9MB/s Write and 11.1MB/s Read. Seems like a typical class 2 card. Took it a while to run the test too since it's so slow lol.

I got 5.4MB/s write, 15.5MB/s read (Antutu) on the 16GB Class 2 card from my Captivate that I wiped and stuck in the Nitro and gave the one that came with it to my Captivate (running hacksung's ICS). Is the included card that bad?

According to AnTuTu:
3.4 MB/s write
>50 MB/s read
According to SD Tools:
5.7 MB/s write
20 MB read
Nothing like some consistency between utils.

Namuna said:
According to AnTuTu:
3.4 MB/s write
>50 MB/s read
According to SD Tools:
5.7 MB/s write
20 MB read
Nothing like some consistency between utils.
Click to expand...
Click to collapse
That just crippled my trust in AnTuTu's tests...sorry but there is no microSD card with >50mb/sec read speed, it's impossible.

32GB or 64GB MicroSD cards for Galaxy S3

I picked up samsung galaxy s3 today and looking for a good sd card. i am considering these two options:
SanDisk Ultra 64 GB microSDXC Class 10 UHS-1 Memory Card 30MB/s with Adapter SDSDQUA-064G-U46A
and another by Samsung
Samsung 32GB High Speed MicroSDHC Memory Card
samsung one seems like a good deal, compared to pricey sandisk.

64gb because it has exFat format 4gb+ file won't be a problem. I have got the same one.

dotpro said:
I picked up samsung galaxy s3 today and looking for a good sd card. i am considering these two options:
SanDisk Ultra 64 GB microSDXC Class 10 UHS-1 Memory Card 30MB/s with Adapter SDSDQUA-064G-U46A
and another by Samsung
Samsung 32GB High Speed MicroSDHC Memory Card
samsung one seems like a good deal, compared to pricey sandisk.
Click to expand...
Click to collapse
Hi,
I bought mine from amazon a few months ago and costed me 78$ $54 Class 10 64GB Micro SD
You should get a 64gb card, because you will have a lot of space for yout stuff and you can format it as exFat!

destynova1988 said:
Hi,
I bought mine from amazon a few months ago and costed me 78$ $54 Class 10 64GB Micro SD
You should get a 64gb card, because you will have a lot of space for yout stuff and you can format it as exFat!
Click to expand...
Click to collapse
No issues with it formatted at exFat? I know someone else with a S3 had issues and had to format it to FAT32.

64gb because MOAR IS BETTER! I formatted mine to FAT32 because from what I've read and experienced with my other devices, it's just safer that way. I've had issues right off the bat using exFAT on some devices (mostly Samsung) or gradually the card will become corrupted (I've lost about 3 full microsd cards full of data so far). From what I've read this is due to Samsung using a half baked implementation of exFAT. exFAT is a patent-pending, proprietary file system created by Microsoft, so if Samsung, or any other OEM wanted to use the full implementation they would have to pay licensing fees. So while you can format it to exFAT using a PC, the way Samsung devices handle it there is high chance of it getting corrupted.

Ricey said:
64gb because MOAR IS BETTER! I formatted mine to FAT32 because from what I've read and experienced with my other devices, it's just safer that way. I've had issues right off the bat using exFAT on some devices (mostly Samsung) or gradually the card will become corrupted (I've lost about 3 full microsd cards full of data so far). From what I've read this is due to Samsung using a half baked implementation of exFAT. exFAT is a patent-pending, proprietary file system created by Microsoft, so if Samsung, or any other OEM wanted to use the full implementation they would have to pay licensing fees. So while you can format it to exFAT using a PC, the way Samsung devices handle it there is high chance of it getting corrupted.
Click to expand...
Click to collapse
How do you format with FAT32? Just using format option in Samsung S 3?
I've been experiencing problem where from time to time, it just corrupt and give me SD card error, and refuse to mount it. I have a 64GB Sandisk Micro SD on Verizon S 3.

rvpals said:
How do you format with FAT32? Just using format option in Samsung S 3?
I've been experiencing problem where from time to time, it just corrupt and give me SD card error, and refuse to mount it. I have a 64GB Sandisk Micro SD on Verizon S 3.
Click to expand...
Click to collapse
I used my laptop's built in SD reader that supports XC cards and just formatted to FAT32. You can use any PC program that formats. I personally used an app called guiformat (http://www.ridgecrop.demon.co.uk/index.htm?guiformat.htm). It's a simple app specifically to format stuff to FAT32. I've heard you can simply use the window's formatter but I've also read of some people that had issues with that.

help lol
hi, Im a noob. Im getting galaxy s3 today. I been reading threads and searching within the tread but someone say something some one else says something else. so Im confused! especially since im noob. Which one is it for god sake!!! lol
Q. Which is class is better? I hear on other threads a class 2 or 4 is good but a class 6 and 10 is not necessary because for a higher speed the manufacturer use the randoms speeds, access speeds to make it faster. That class 10 don't necessarily means better,class 10 is too fast for for the phone that it will freeze or ppl having problems. You need a class 6 for apps2sd or Data2sd.
So im thinking a class 6 would be good for me since I use apps2sd alot, roms, I will download some music, vids and movies. 32gb class 6 SanDisk - Mobile Ultra 32GB microSDHC Class 6 Memory Card bestbuy sale 4 $30 has anyone body tried it?
Can someone who really knows tech stuff about sd cards answer plz
Thank you, sorry for all the questions...

missmonet said:
hi, Im a noob. Im getting galaxy s3 today. I been reading threads and searching within the tread but someone say something some one else says something else. so Im confused! especially since im noob. Which one is it for god sake!!! lol
Q. Which is class is better? I hear on other threads a class 2 or 4 is good but a class 6 and 10 is not necessary because for a higher speed the manufacturer use the randoms speeds, access speeds to make it faster. That class 10 don't necessarily means better,class 10 is too fast for for the phone that it will freeze or ppl having problems. You need a class 6 for apps2sd or Data2sd.
So im thinking a class 6 would be good for me since I use apps2sd alot, roms, I will download some music, vids and movies. 32gb class 6 SanDisk - Mobile Ultra 32GB microSDHC Class 6 Memory Card bestbuy sale 4 $30 has anyone body tried it?
Can someone who really knows tech stuff about sd cards answer plz
Thank you, sorry for all the questions...
Click to expand...
Click to collapse
I've personally been using Class 10s for my devices and haven't had any issues as long as it's formatted in FAT32.

The difference between the sdhc cards and the sdxc cards is that the xc are intended to be used on usb3 systems so that they can take advantage of the speed. This is important when you are loading the card with your music library or unloading it with your photos. (and you don't do it mounted inside the phone.)
A Sandisk 64GB sdxc class ten card won't get the 30mb read speed advertised. It gets regular class 10 speed, the gs3 has no speed improvements when using this type of mcard. Here's a speed test in the phone of the Sandisk 64GB sdxc I got the other day.
IME, exfat is sensitive to power level change and anything that stalls or disrupts any read/write operation. However, if the phone says that it is damaged, just put it in to your adapter and a pc with exfat support and run chkdsk /f (with the fix options selected).
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

Hi. I'm getting the SanDisk 64gb class 10 tomorrow. So formatting it using the phone will make it FAT32? As previously mentioned in the thread it isn't worth formatting to exFAT, right?
Sent from my GT-I9300 using Tapatalk 2

prinzhernan said:
Hi. I'm getting the SanDisk 64gb class 10 tomorrow. So formatting it using the phone will make it FAT32? As previously mentioned in the thread it isn't worth formatting to exFAT, right?
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
The default system as far as I know in SGS3 is exfat. Use a free downloadable tool by name mini tools and format the card to fat 32. I have a 64 GB micro sd class 10 sandisk. I have no problems using it . My 32 gb card was running out of space because of music files If you are getting a new card you can do a surface test with the tool i mentioned above so that you know whether it has any defective sectors. It does take some time though.

sankar24 said:
The default system as far as I know in SGS3 is exfat. Use a free downloadable tool by name mini tools and format the card to fat 32.
Click to expand...
Click to collapse
This is correct, it formats exfat on the 64Gb. I did this yesterday and using myTerminal app, the mount command shows that the card is formatted exfat.
Now, it's an interesting thing, exfat is a licensed format, and Samsung paid for a license, however anyone with a rooted phone has some sort of Busybox installed which replaces most of the exfat commands with Linux standard ones.... is this better or worse?
I have a question for the people who have formatted fat32, how big is the space on the 64Gb? on exfat it's 59.47Gb what's yours?

sankar24 said:
The default system as far as I know in SGS3 is exfat. Use a free downloadable tool by name mini tools and format the card to fat 32. I have a 64 GB micro sd class 10 sandisk. I have no problems using it . My 32 gb card was running out of space because of music files If you are getting a new card you can do a surface test with the tool i mentioned above so that you know whether it has any defective sectors. It does take some time though.
Click to expand...
Click to collapse
stan.s said:
This is correct, it formats exfat on the 64Gb. I did this yesterday and using myTerminal app, the mount command shows that the card is formatted exfat.
Now, it's an interesting thing, exfat is a licensed format, and Samsung paid for a license, however anyone with a rooted phone has some sort of Busybox installed which replaces most of the exfat commands with Linux standard ones.... is this better or worse?
I have a question for the people who have formatted fat32, how big is the space on the 64Gb? on exfat it's 59.47Gb what's yours?
Click to expand...
Click to collapse
Thanks for the reply guys. As I'll be using files bigger than 4gb exFAT would be the best choice. I've read in some threads though that this file system corrupts in the s3 over time, she was the card fills up. I don't know if this is true since it was only mentioned thrice in 3 different posts. Can anyone verify this?
Sent from my GT-I9300 using Tapatalk 2

prinzhernan said:
Thanks for the reply guys. As I'll be using files bigger than 4gb exFAT would be the best choice. I've read in some threads though that this file system corrupts in the s3 over time, she was the card fills up. I don't know if this is true since it was only mentioned thrice in 3 different posts. Can anyone verify this?
Click to expand...
Click to collapse
My old 32gb is mostly standard stuff that I keep from phone to phone (like contacts backups music). So I have a copy on my desktop. Anyway, I had 29Gb filled on the card as a normal condition with Nandroid backups and TI backups.
When I was transferring this to the new 64Gb card, I was trying to use a 4 port USB OTG with the old card in the USB stick adapter. I fumbled with the power supply to the 4port and the phone didn't like it and unmounted the card, and wouldn't mount it again. I put it into my desktop with an adapter (on XP you need a patch for exfat from MS) and ran a chkdsk /f on it (took some time as I don't have USB3). The chkdsk finished (I made a backup to the desktop since some of the nandroid was new.) and put the card back into the phone. It worked for a few hours, I was listening to music on the card. The battery ran low, and I shut down to swap batteries and the card wouldn't mount again and claimed damaged and needed a format. Since I had everything backed up (and still had the old card, too), I just formatted it in the phone. Used the OTG to get the data back on from the old card. Everything's been good since 30+ hours without turning the phone off. But as I write this, I swapped batteries (full shutdown) and when I rebooted, the card wouldn't mount (and doesn't say that it's corrupted).
It also takes more than a minute (maybe two or so) to mount the card when the phone boots. This also makes it totally unusable for applications being stored on it or data for applications on it or for swapping apps like App2SD where it links the external card to the internal card and visa versa. If the app tried to access data on the card while it's being checked, it may not have the code to support the error returned. If the app needs to be running at bootup, few are going to wait until the card is ready, and the os will query for the card. I know that this was a problem on GB, and is one of the reasons so many oems are including more very fast internal storage in the phones.

Thanks guys. I would probably try exfat and see it works... FAT32 is always an option!

Just got my card an hour ago. Right out of the box I tried copying a bunch of files and I encountered an error. Reformatted it using windows and now it runs fine. So I guess it would be best to format it again and not use it right out of the box.
Sent from my GT-I9300 using Tapatalk 2

fwiw. I kept trying to mount the card, and finally got to the point where it said it was 'corrupted'. I put the card into a windows box without problems, could read the data, etc. Ran a chkdisk /f to find and fix any errors, no problems. Tried to put it back into the phone and it still wouldn't mount. Gonna give Samsung a call since it works in Windows, it either Samsung or Busybox that's the issue.

stan.s said:
fwiw. I kept trying to mount the card, and finally got to the point where it said it was 'corrupted'. I put the card into a windows box without problems, could read the data, etc. Ran a chkdisk /f to find and fix any errors, no problems found, once again. Tried to put it back into the phone and it still wouldn't mount. Gonna give Samsung a call since it works in Windows, it either Samsung or Busybox that's the issue.
Click to expand...
Click to collapse
I ran a chkdsk /f again, no errors. Then I downloaded the sdformatter from the sdcard working group. https://www.sdcard.org/downloads/formatter_3/ this is a free formating program that will make sure you have formated to the sdcard org standards. You can not choose the file system. You can choose to do different types of erase as a part of the format.
Anyway, after the chkdisk, I tried to mount the card but it would not. I then made another backup of the data, and did a long format (exfat) with a simple erase rather than the zeroes erase. Copying the data back and lo and behold it mounted. My phone though hasn't been off since though. Since I don't have usb 3 the formatting and data transfers take hours to complete. I am going to have to get a usb3 card for at least one pc and a usb3 card reader.
Samsung was not any help and wanted me to do a factory reset.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

Ordered a 64GB class 10 from buy.com today for $48 shipped! Should be perfect for me brand new GS3 :good:

MicroSD speed spec?

Any idea what speed MicroSD cards the HTC 10 will support? It'd be nice to get a high-spec UHS card to use the expandable storage! Coming from a Galaxy S4 and S2, my last HTC device was an HTC Desire - so I'm not sure what the previous generation of HTC devices supported.

I guess it supports U3, because A9 does.

Good to hear, looks like I'll be upgrading my MicroSD card then, thanks!

Great news. I have a U3 card but don't get the full benefit of it at the moment. When I searched for this information on precious phones I could never find anything!

I called HTC today to see if they could tell me if the HTC 10 will support UHS-II but after consulting with the build team they still did not understand what I was asking about so hopefully the full specs on the bus type for the memory card reader will be released soon. If anyone knows if HTC 10 supports UHS-II please comment as I am considering buying the new sandisk card or the samsung pro + U3 card depending on what the bus type is.

Odifrog13 said:
I called HTC today to see if they could tell me if the HTC 10 will support UHS-II but after consulting with the build team they still did not understand what I was asking about so hopefully the full specs on the bus type for the memory card reader will be released soon. If anyone knows if HTC 10 supports UHS-II please comment as I am considering buying the new sandisk card or the samsung pro + U3 card depending on what the bus type is.
Click to expand...
Click to collapse
If you're getting Samsung Pro+ U3, you don't need UHS-II. Its specs are:
UHS-I / U3 / Class 10
Max. Read Speed: 95 MB/s
Max. Write Speed: 90 MB/s
It's a fast card. I got several 64 GBs when it was on sale for $28. The 128 GB version is available but almost double the price of slower 128GB cards, but still not a bad deal IMO.

lost_ said:
If you're getting Samsung Pro+ U3, you don't need UHS-II. Its specs are:
UHS-I / U3 / Class 10
Max. Read Speed: 95 MB/s
Max. Write Speed: 90 MB/s
It's a fast card. I got several 64 GBs when it was on sale for $28. The 128 GB version is available but almost double the price of slower 128GB cards, but still not a bad deal IMO.
Click to expand...
Click to collapse
Thank you for the response. I was going to get a UHS-II CARD if the HTC 10 used that bus. If they stick with the UHS-I then I was going to go with the samsung pro plus. Glad to here you like your card, I have read nothing but positive remarks on the samsung cards.

So which card (in terms of speed) to get for optimal user experience?

So I was anxiously waiting for HTC's reply about the UHS-I vs UHS-II.
Randomly looked at the SD820 specs five minutes ago. I'm feeling so dumb right now.
https://www.qualcomm.com/products/snapdragon/processors/820
Storage
UFS 2.0
eMMC 5.1
SD 3.0 (UHS-I)
Click to expand...
Click to collapse
Well there's our answer.
And since the A9 supported UHS-I U3, the 10 will also support UHS-I U3.
It will NOT "fully" support UHS-II U3 cards, they will work (backwards compatibility) but you will not get the full speed benefit of them!
Maybe we'll get SD 4.0 (UHS-II) with Snapdragon 830 or whatever it will be called..
MAkS1 said:
So which card (in terms of speed) to get for optimal user experience?
Click to expand...
Click to collapse
I'm going to assume you mean with Adoptable Storage "enabled".
Well, of course an UHS-I U3 card. Sure you can buy and use an UHS-II U3 card but there is no real benefit to that because the 10 fully supports only UHS-I U3. Also UHS-II U3 cards are really expensive..
For user experience, buy the microSD card with the fastest random 4K read and write speed possible.
Why "random 4K"? Because what we do on our devices is inherently random. Opening an app, updating an app, skipping music files and such. Only things that we do on our devices which are sequential in nature would be recording a video, taking a photo, downloading a large file and so on. (or transferring big files PC<>phone)
Sequential read/write speeds with SD cards (or SSD or HDD) are what's advertised most of the time and those speeds are already waaay more than enough so no need to focus on those aspects!
For example phones record 4K video usually at about 40-65Mbit/s which is 5-8.1MB/s. And that's sequential, not random.
That's about the heaviest sequential write operation we do on our phones. Downloading a large OS update could be "heavier" if you have really fast internet speed.​
For random 4K read, I consider 10MB/s or above as really good. 8-9MB/s or below, I personally wouldn't bother.
For random 4K write, at least 1MB/s. 2MB/s is nice and above is excellent. (biggest impact=App install/update, OS update etc)
For speed reference and a reason for the above speed recommendations:
Anandtech's internal NAND random 4K speed tests from Galaxy S7 review part 1.
​
You can for example google "make model crystaldiskmark" and see the results.
If you don't find CrystalDiskMark results for some specific microSD card
a) don't bother because it's some random card
b) rummage through Newegg or Amazon etc buyer reviews. Occasionally some kind soul will benchmark his/her recent purchase and include the numbers in his/her review.
For example the Sandisk Extreme microSDXC 64GB is really nice
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Kingston UHS-I U3 microSDXC 64GB also looks nice at the first glance but look at the random 4K write speed, that's horrendous! (don't even touch it with a ten foot pole)
Lexar 1800x microSDXC 64GB is one of the best I've ever seen. But it's so expensive (100€'s) ;(
Disclaimer: when you are looking at CrystalDiskMark results for 4K speed, do not look at the QD32 or Q32Tx numbers.
Only look at the 4K speed numbers that don't have the QD32 or Q32Tx text next to them, that's the number we are interested in.
QD stands for Queue Depth. Long story short: Queue Depth means how many read and/or write (I/O) operations are queue'd one after the other.
QD32 is a REALLY high and ridiculous number. You do not see that kind of queue depth with I/O operations on a phone, not on a PC, and heck, most of the time not even in servers either.
The speed number which does not have QD32 or Q32Tx text next to it means that the Queue Depth is 1. Only 1 read or write operation is queue'd. That's the normal kind of QD you see in phones or PC's.

so i ordered the 128gb Sandisk Ultra card... i know it is slightly slower than the Extreme range but I wanted more than 64gb to store all my music etc... will I actually notice any issues running this card rather than one of the faster ones?
Sent from my HTC One using XDA-Developers mobile app

c4llum said:
so i ordered the 128gb Sandisk Ultra card... i know it is slightly slower than the Extreme range but I wanted more than 64gb to store all my music etc... will I actually notice any issues running this card rather than one of the faster ones?
Click to expand...
Click to collapse
For music listening I would say no. The difference will be when you want to save large files to and from the card. This is when the differences in speed per second add up over minutes when you are talking about gigabytes of data transfered.
In reality, this shouldn't be a big issue unless you are constantly moving big files. I guess the most relatable for me would be twrp backup to SD card. For a file of that size I would only imagine an extra 30 seconds to 1 minute so its still fine.

rav101 said:
For music listening I would say no. The difference will be when you want to save large files to and from the card. This is when the differences in speed per second add up over minutes when you are talking about gigabytes of data transfered.
In reality, this shouldn't be a big issue unless you are constantly moving big files. I guess the most relatable for me would be twrp backup to SD card. For a file of that size I would only imagine an extra 30 seconds to 1 minute so its still fine.
Click to expand...
Click to collapse
great thanks for the info. I thought so but best checking. I occasionally download or copy over the odd movie file over wifi from my NAS but happy with the current read/write speeds i get on my m7 internal storage so im sure the htc10 and ultra card combo will be an improvement anyway!
Sent from my HTC One using XDA-Developers mobile app

c4llum said:
great thanks for the info. I thought so but best checking. I occasionally download or copy over the odd movie file over wifi from my NAS but happy with the current read/write speeds i get on my m7 internal storage so im sure the htc10 and ultra card combo will be an improvement anyway!
Click to expand...
Click to collapse
You will bottleneck in that scenario... But I would imagine it would be the WiFi causing the slow down rather than the card.
It will be most notable when downloading and uploading via a cable. Or saving to the card from the phone (like twrp which is generating data for the card rather than getting it from the USB cable or online).
I don't think you will have anything to worry about here buddy.

I wouldn't think it comes with a UHS-II bus since no phone in existence does.
Sent from my SM-G935T using Tapatalk

c4llum said:
so i ordered the 128gb Sandisk Ultra card... i know it is slightly slower than the Extreme range but I wanted more than 64gb to store all my music etc... will I actually notice any issues running this card rather than one of the faster ones?
Sent from my HTC One using XDA-Developers mobile app
Click to expand...
Click to collapse
If all you're doing is storing music and pictures on it, you won't see a problem. If you decide to use a slower card as expanded storage though, it's going to be a bottleneck for your applications.
I'm going to be doing some research into the fastest card the phone will support, methinks!

Rohaq said:
If all you're doing is storing music and pictures on it, you won't see a problem. If you decide to use a slower card as expanded storage though, it's going to be a bottleneck for your applications.
I'm going to be doing some research into the fastest card the phone will support, methinks!
Click to expand...
Click to collapse
I am still not sure if it's worth to use it as an expanded storage. I ordered a Samsung extreme pro but I'm undecided about using it externally or not... Anyone has input on this? Any other phones that allow this?
Sent from my Nexus 6P using XDA-Developers mobile app

rubi76 said:
I am still not sure if it's worth to use it as an expanded storage. I ordered a Samsung extreme pro but I'm undecided about using it externally or not... Anyone has input on this? Any other phones that allow this?
Sent from my Nexus 6P using XDA-Developers mobile app
Click to expand...
Click to collapse
I think this should be possible on any device that has received marshmallow, I used temporally on my oneplus x with cyanogenmod 13, worked fine but I can't speak about performance, I'm not a smartphone gamer and I don't record in 4k

rubi76 said:
I am still not sure if it's worth to use it as an expanded storage. I ordered a Samsung extreme pro but I'm undecided about using it externally or not... Anyone has input on this? Any other phones that allow this?
Sent from my Nexus 6P using XDA-Developers mobile app
Click to expand...
Click to collapse
im going from 32gb total storage in my M7 for apps, games, music, photos, videos etc. to 32gb internal for apps + games and 128gb for everything else.... think il be fine!
and i wont use adoptable storage as il want to occasionally plug microsd into PC to transfer files etc.
Sent from my HTC One using XDA-Developers mobile app

Looks like the Sandisk Extreme Pro is the best suit for adoptable storage use:
http://www.techfunology.com/electro...for-photography-action-cams-and-videocameras/
Or is this overkill?

MAkS1 said:
Looks like the Sandisk Extreme Pro is the best suit for adoptable storage use:
http://www.techfunology.com/electro...for-photography-action-cams-and-videocameras/
Or is this overkill?
Click to expand...
Click to collapse
That should be the best one, you want u3. So SanDisk Extreme Pro UHS I - U3 Should be in the 40-50 dollar range for a 64gb. They don't make them any bigger.