Develop Bugs

Do i NEED a Class 6 Micro SDHC Card

Hello all,
Ive got a spare 16GB Micro SDHC card which i have swapped for the stock 2GB version that came with the Desire, but it is only a Class 2.
Having read that its best to use Class 6, should i shell out £50 for a new one, or will i not notice a difference in class ?

Dunno - I'm using a class 2 16gb card myself and I don't notice much slowdown if at all. I'm surprised these things haven't come down in price after two years... key thing is do you notice any slowdown with apps that access the SD card? like I say, I haven't thus far...
Sent from my HTC Desire using the XDA mobile application powered by Tapatalk

i read somwhere that class 4 is enough coz the phones do not support hihger speeds. class 6 will help you if you will take card to the card reader straight to the computer... it think

hot-fuzz said:
... Having read that its best to use Class 6 ...
Click to expand...
Click to collapse
Where have you read that, please?

tomeeq12 said:
i read somwhere that class 4 is enough coz the phones do not support hihger speeds. class 6 will help you if you will take card to the card reader straight to the computer... it think
Click to expand...
Click to collapse
Thats what i ......... think. Im sure it only matters if its connected to the PC, and in that case i dont care.
I read it on another forum that i wont link too
Class 6 are almost double the price of Class 2.

You don't NEED to get one, I did use a Class 2 card for a few days and didn't have any problems.
Personally I am using a Class 6 now, as I regularly transfer a lot of big media files onto the card, so the extra speed is worth it for me.
If you don't fancy forking out though, you don't have to.

I totally agree, My desire came with a 4gb sandisk class memory card which I initially assumed was class 4 until I took the card out yesterday...connecting the desire to my pc and switching to usb drive mode, i am able to transfer my movies etc to the memory at +/- 8Meg per sec which is more than adequate enough for me...I was about to get a 16gb one but was thinking of getting the class 6 one until i discovered the one I currently have is class 2, so I just made up my mind and went for a class 2 16gb, saved me money....

They only refer to the write speed of the card, i came from a 8gb class 6 and now have a 16gb class 2 and notice no difference, only difference is the write speed from pc to card.
Even though i got a class 2 i still see 4-6mb/s so happy enough with that.

I have a class 10 16Gb card in phone. Read and write speeds seem to be limited to around 8Mb per second (copying uncompressed music). Using an adapter, the computer is able to copy at 14Mb+ using the same card.

They just seem a big outlay for nothing to me, lets face it the only big write time is when you transfer everything across from your previous card once the stuff is on there the write times really won't be much of a problem.

The main reason you will find people suggesting class 6 and above SD cards is due to "Apps to SD". For the Newbies "Apps to SD" or A2SD is a modification that has been done on most android phones (though not the desire at time of writing) which allows the Apps you download to be stored on the SD card rather than the phones limited internal memory. I am not sure if it makes a huge difference to the faster processor phones, but in the G1 days it was noticeable. For just moving music and pictures about it isn't really important to have a faster card and we may have to wait a while for A2SD anyway. I will pop over to the N1 forum and see if they can shed some light on this.

Anyone using a microSD 16GB Class 4, if so are they any good? I'm looking at buying one for the Desire. Also where's the best place to get a deal on one of these card?

microsd samsung 32 gb class 10 lag and problems

hi, i'm using the latest firmware 4.0.2.A.0.58 firmware and I have a problem.
When I insert my 32gb microsd the phone become laggy and it seems freezed.
I tried the card on the pc, did a surface test, and it is perfect.
When I unmount the card the phone works properly.
If i use another 16gb microsd the phone still working properly.
So..what's the matter?does anyone noticed the same issue?
thank you!

No, mine works fine
Check my sig for more info on my sd and setup
Sent from my LT15i using XDA Premium App

It takes a time for phone to read out and sync media player if you got lot of music, videos, picture games etc.
Sent from my LT15i using XDA Premium

loryb84 said:
hi, i'm using the latest firmware 4.0.2.A.0.58 firmware and I have a problem.
When I insert my 32gb microsd the phone become laggy and it seems freezed.
I tried the card on the pc, did a surface test, and it is perfect.
When I unmount the card the phone works properly.
If i use another 16gb microsd the phone still working properly.
So..what's the matter?does anyone noticed the same issue?
thank you!
Click to expand...
Click to collapse
may be your memory card carry viruses so try to format it and then format your cell phone also(reset configuration with erase memory card)....may be this could solve your problem...

I see that you guys all use a class 10 card. Is there really a big difference compared to lower class cards?
My phone worked smooth enough with the stock 8GB class 2 card, and my current Transcend class 4 16GB doesn't harm the phone's performance.

class 4 is enough, on phone you will not see any DIFRENCE.
When you connect your phone to PC over USB and conect it to mass storage, you will see then POWER OF CLASS 10. faster uploading to PC, and faster dowloading from PC.
On phone class 10 and class 4 are the SAME.

Well, I noticed a difference and prefer the class 10 all the way.
Sent from my iPad 2 using Tapatalk

Hi hi Ok I have a problem and hoping someone can help...
I purchaced a kingston 32GB class 10 memory card and plagued with issues since having it.
My setup is...
Arc LT15
.42 Firmware
Advanced stock kernel
32GB class 10 memory card
Now the problem is images and videos and apps.
Apps...
They keep ramdom uninstalling if they are stored on the memory card
Videos/pictures
Any I have taken since installing the card become corrupted. Even screenshots.
IE I took a screenshot and it displayed on the phone, I went to gallary and viewed it fine.
Came to home screen and back to gallery still fine.
Left some time went to gallary and corrupt.
Cannot be viewed even by PC
This also happened to videos.
I had this problem so installed a totally fresh se rom updated via SEUS (I think)
Cleared dalvik cache and user cache etc manually installed the apps from the card etc etc used no backups apart from contacts backup
Everything was totally clean.
Even my language from swiftkey keyboard app keeps deleting randomly :/
Still getting the issue :/ Is there anything i'm missing?
Thanks,
Jinx13

Hey guys... read cearfully!
The class 10 approx parameters are... Read- 22 mb/s write 10 mb/s
The class 4 are Read 10 mb/s Write 4 mb/s...
So why your phones working bad with class 10?
Because those are linear read-write speeds...and you are using it only while USB connection by moovie transfer or watching... What is the rest card usage?
It is random read-write or seqental read-write used by yor apk's or fo example thumbs of stock gallery.
These speeds are for class 10 - 0.08 mb/s
class 4 - 0.8 mb/s
See the difference now? So class 10 is good for DSLR cameras or mediaplayers etc. Class 4 perfect for phone. Mine 32gb class 4 just flying!!!!!

So your saying 32GB class 10 is not supported fully by the ARC?
Jinx13

I don't get you.
SD speedtest apps give me ~10MB/s write and 20+MB/s read, so it's supported.
Also it feels faster than a class 4 (class 4 vs class 10 was tested in my X10, but Arc is even faster)
Sent from my LT15i using XDA Premium App

It is linear speeds...like you are reading or writing moovie or some one solid big file...
But the system uses random read of small files... And there class 10 looses. On class 4 compared to class 10 in gallery 1000+ photo thumbnails appears in seconds.
Try crystall disc mark software to test your card on PC and you will see. Test config is 5 tests at 100mb...pay attention at 4K and 4Kq32 speeds. At class 10 they are 0.04-0.08...

Ah
Anyways, I'm happy with my 32GB class 10
Sent from my LT15i using XDA Premium App

Ofcourse you are! I just wanted to make it clear for those who says that it is lagy or like that...

But it isn't laggy with the class 10 when you have a good sd card.
The cheap Kingston 16GB class 10 from eBay lagged often in Astro, but no problems with my Patriot 32GB class 10 sd card
Sent from my iPad 2 using Tapatalk

So can anyone explain why I might have problems?
From my previous post I just rebooted my phone and lost my SD apps AGAIN!!

Yep! Patriot is one of that card of class 10 that gives you a great performance in any type of R/W. There is a post here, on XDA...there said that patriot is the best card, so my answer is not for you man)))))
About sd apps loss you shold check your app wich provides managment of apps to sd card - links2sd or what it is... the promlem is not in the card.

Or check the sd if it corrupts files.
Sent from my iPad 2 using Tapatalk

ishishkin said:
Yep! Patriot is one of that card of class 10 that gives you a great performance in any type of R/W. There is a post here, on XDA...there said that patriot is the best card, so my answer is not for you man)))))
About sd apps loss you shold check your app wich provides managment of apps to sd card - links2sd or what it is... the promlem is not in the card.
Click to expand...
Click to collapse
It is not that program as that program just points to the settings page to move the file.
I have decided to put my 8GB class 2 back in and that is working without problems.
Flo95 said:
Or check the sd if it corrupts files.
Sent from my iPad 2 using Tapatalk
Click to expand...
Click to collapse
Yes it corrupts the images and videos from gallary
After testing with my old card since yesterday I will try send my card back.
Thanks for replies,
Jinx13

I bought a Kingston 16GB class 10 - Full of problems (returned)
Then a Kingston 32GB class 4 - better results but not that speedy
Now I found for 46euros here in Greece a Samsung 32GB class 10 so I said I have to try this.. and voila! The card is perfect, no lags! The phone is super speedy now!
So I guess it have to do with the cards not the brand.. if you re lucky you will end up with a good card.

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.

Will A 16GB OR 32GB MEMORY Card MAKE a SAMSUNG GALAXY ACE Slow

i wana to have a new MicroSD Card for my Samsung galaxy ace i have 2 options:
Transcend Memory Card MicroSDHC 8GB class 10
​or
16GB class 4 almost same price online,and
my Galaxy ace is 278 MB RAM and 800MHz processor will i get smooth experience if i use 16GB card....so what to do plz reply ASAP.

nope they wont

I don't think that is how storage works, It should be fine.

If you were one of my Soldiers you would be doing pushups right now. The only downfall of a bigger SD card is the little bit it'll take to scan it upon bootup and upon unmounting it from your computer.

It should not slow down the device all the time, but during boot when scanning the card, but otherwise you should not notice a lag.
Sent from my R800x using xda premium

zeeky120 said:
It should not slow down the device all the time, but during boot when scanning the card, but otherwise you should not notice a lag.
Sent from my R800x using xda premium
Click to expand...
Click to collapse
it's really more post boot, than during boot. after the phone starts, then there's be a delay when it has to scan the device.

Thats good I will buy 32gb...

32GB support your phone or not. Then buy a class-6 or class-10 memory.

its not if u buy min class 4 or 6.....

stevenkhan168 said:
32GB support your phone or not. Then buy a class-6 or class-10 memory.
Click to expand...
Click to collapse
my phone does support up to 32GB...but i don't have such need..

Thank you all for u'r reply i have got my self a 8GB class 10 @650 and i am good access speed
read spedd18MBPS
write speed:10Mbps

8 GB Best.

i know there are different classes of memory cards but i dont think its that much of a difference memory cards arnt like ram where the effect the speed of your phone a noticeable amount

I also want to try 32gb to my device

Then again the more stuff you have on it, the more time it would take to index and find things bit its not really like a hard drive so it won't have fragmentation

uhs-1
what do you guys think of UHS-1 cards I found one for a nice price 16gb
Baud rate:
Reading:up to 20 MB/sec
Random read (4 KB)up to 500 IOPS
Random entry (4 KB)to 50 IOPS

I personally use a 16GB class 10 card, was made by Lexar...
It was only £15.50 and came with a USB and SD card adapter, can't complain...
Real speeds are about 11.5mb/s write, and 16mb/s read
Hope this helped you decide...

no make it slow

SGT_Watkins said:
If you were one of my Soldiers you would be doing pushups right now. The only downfall of a bigger SD card is the little bit it'll take to scan it upon bootup and upon unmounting it from your computer.
Click to expand...
Click to collapse
Wow!!! I just thought it was my phone. LOL
Sent from my LG-P999 using xda premium

samsung galaxy ace
Hi im looking at getting mircro sd card for my samsung galaxy ace, i have a 8gb class 4 in at the moment but im looking at getting this:
32GB MICRO SDHC MEMORY CARD WITH SD ADAPTER TF HC MICROSD
****** 5 Year Warranty. Class 6******************
Would this also work? any help would be great

[Q] 16GB Class 10 Micro SDHC, only 2MB/s write speed

So I have this SanDisk Ultra 16GB Class 10 microSDHC Card from Best Buy, which was on sale for $20 when I bought it two months ago. Formatted the card as soon as I put it inside the phone. I started to transfer some music albums from my PC and the write speeds are very slow, averaging only 1.8 MB/s. I'm not getting anywhere near Class 10 write speeds. Don't have a USB SD card reader that supports SDHC, so I don't have the option to take it out and use the SD adapter. I tried using an SD speed increase app and changed the cache to 2048 KB, but same result. Didn't want to bring up this issue until now.
Anyone have any solutions to this? If it helps, I'm running CM 10.1 (Android 4.2.1), Nitest 12-31 kernel for CM 10.1 Preview Build.

Makes a huge difference because you will need a usb 3.0 port on your computer for that to work
Sent from my SPH-D700 using Tapatalk 2

phonehunter59 said:
Makes a huge difference because you will need a usb 3.0 port on your computer for that to work
Sent from my SPH-D700 using Tapatalk 2
Click to expand...
Click to collapse
I don't think so. My Transcend 4GB C10 and Lexar 16GB C10 are writing at 10MB/s just fine on USB 2.0 reader and ports.
Sent from HTC Incredible S @ CM10

AndyYan said:
I don't think so. My Transcend 4GB C10 and Lexar 16GB C10 are writing at 10MB/s just fine on USB 2.0 reader and ports.
Sent from HTC Incredible S @ CM10
Click to expand...
Click to collapse
I get about 6-8 MB with a class 4 on usb 2.0 ports
Sent from my SPH-D700 using Tapatalk 2

InsaneHien said:
So I have this SanDisk Ultra 16GB Class 10 microSDHC Card from Best Buy, which was on sale for $20 when I bought it two months ago. Formatted the card as soon as I put it inside the phone. I started to transfer some music albums from my PC and the write speeds are very slow, averaging only 1.8 MB/s. I'm not getting anywhere near Class 10 write speeds. Don't have a USB SD card reader that supports SDHC, so I don't have the option to take it out and use the SD adapter. I tried using an SD speed increase app and changed the cache to 2048 KB, but same result. Didn't want to bring up this issue until now.
Anyone have any solutions to this? If it helps, I'm running CM 10.1 (Android 4.2.1), Nitest 12-31 kernel for CM 10.1 Preview Build.
Click to expand...
Click to collapse
My Take...
1.Transferring multiple small files will always be slower in transferring speed than a single big file.
2. Using your phone as an alternative to sd card reader will be a lot slower at transferring files to your PC. I always prefer to take out the memory card out of my phone and connect it with an sd card reader instead of attaching a direct usb cable to my phone.
3. install "SD Card Tester" from the play store, try to close all the other open apps and test your memory card with it within your phone. My results with my Micro Center branded class 10 card were ~6MB for Writing and ~7MB for reading of 348MB test file... I'm sure though if I test it again with my PC it would meet the advertised 10MB writing speed.