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 ...
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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?

I want a 32GB memory card; questions regarding installation

Which 32gb card should I get? I heard there are classes for each.
When I buy one, what is the best method that I should transfer my data from the 8 GB one to the new one?
Is there anything else important that I have to know like reformatting the new card before using it? Will the phone do that already?
Thanks!

I doubt they have the faster classes yet. The 8gb that came with the Evo is a class 2, and for most people that's fine. If you have unusually high bitrate MP3s or something, you might run into issues with a class 2, but you should probably be fine.
Most of the higher class cards are made for cameras and such. RAW on DSLRs are like what, 50+ mb files? You need a fast memory card to be able to take more than one shot at a time.
I always move things from a smaller card to a bigger one via my PC and copy and paste. I usually set up a folder on the desktop, copy into there, then copy that out into the new card. You get a nice backup of your card that way too.
You shouldn't need to do anything special to install the card, just pop it in. If you just copy and paste like I do, the phone won't miss a beat, all your ringtones and stuff will show right back up.

Check Verizon, They were having a spexial, 95 bucks for a scandisk class 2 works fine for all but hiher bitrate stuff. Beware of cheap ones on ebay and such, thay are almost always fakes.
Evo Sent

As far as transfering, copying the whole thing to your pc and back to the new card will be fine.
If you want to be careful about it, snag a windows app that will generate md5 hashes recusively and check on card then on disk and then on new card.
Sent from my PC36100 using XDA App

Thanks all.

Borg1982 said:
Which 32gb card should I get? I heard there are classes for each.
When I buy one, what is the best method that I should transfer my data from the 8 GB one to the new one?
Is there anything else important that I have to know like reformatting the new card before using it? Will the phone do that already?
Thanks!
Click to expand...
Click to collapse
Only Class 2 32GB microSDHC exists.

Go with the Kingston 16 GB Class 10
http://www.amazon.com/Kingston-Micr...?s=electronics&ie=UTF8&qid=1281321236&sr=1-12
When I added my card I just formated it and put it in and it works fine. Not sure if I had to copy files from the old one but every thing works fine.

rhconcepts said:
Go with the Kingston 16 GB Class 10
link
When I added my card I just formated it and put it in and it works fine. Not sure if I had to copy files from the old one but every thing works fine.
Click to expand...
Click to collapse
ordered mine on friday, cant wait for it arrive this week sometime
(i wasnt allowed 2 post a link here since im a new user, but buy the 1 from etech, ull save about $8 over the link above...)
i got it for $99.98 including tax+shipping, etc... it also comes with the adapter...

rhconcepts said:
Go with the Kingston 16 GB Class 10
http://www.amazon.com/Kingston-Micr...?s=electronics&ie=UTF8&qid=1281321236&sr=1-12
When I added my card I just formated it and put it in and it works fine. Not sure if I had to copy files from the old one but every thing works fine.
Click to expand...
Click to collapse
I got this card and I was disappointed in it's performance. I downloaded an SD speed tester from the market and tested my stock 8gb class 2 card and got around 1.75mb/s write time and around 2.5mb/s read time. With the 16gb class 10 (as above) I got marginally better results; 2.28mb/s write and 3.42mb/s read. Better, yes, but I probably would have gotten the same with a class 6 and maybe even a class 4. *shrug* These are only my experiences, maybe you'll have better luck.

jerryparid said:
Only Class 2 32GB microSDHC exists.
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Click to collapse
http://www.buy.com/prod/3c-pro-32gb...ss-4-with-sd-adapter/q/loc/101/216378749.html ?
http://www.buy.com/prod/topram-32gb...card-class-4-with-sd/q/loc/101/216378751.html ?

spiicytuna said:
I got this card and I was disappointed in it's performance. I downloaded an SD speed tester from the market and tested my stock 8gb class 2 card and got around 1.75mb/s write time and around 2.5mb/s read time. With the 16gb class 10 (as above) I got marginally better results; 2.28mb/s write and 3.42mb/s read. Better, yes, but I probably would have gotten the same with a class 6 and maybe even a class 4. *shrug* These are only my experiences, maybe you'll have better luck.
Click to expand...
Click to collapse
it may also be the it isn't the card that is the bottleneck, could be the r/w of the phone. if it can't write that fast, then having a fast card isn't going to do anything but sit there wasted.

My 16gb class to write speed was 7mb read 4mb on my evo
Sent from my PC36100 using XDA App

What class is the default EVO 8 GB card?

timothydonohue said:
it may also be the it isn't the card that is the bottleneck, could be the r/w of the phone. if it can't write that fast, then having a fast card isn't going to do anything but sit there wasted.
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Click to collapse
That is exactly my point. The op + others could save money by going with a cheaper card. I found out I have a 4gb class 4 at home, so I will test that tonight to see what its throughput is and post back here.
Sent on the go from my HTC EVO

martyzidek said:
My 16gb class to write speed was 7mb read 4mb on my evo
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Which program are you using to benchmark?
Sent on the go from my HTC EVO

[Q] MicroSD card...is this a good deal?

Hello people,
I just came across this microsd card deal:
http://mobile.dailysteals.com/Default.aspx
this is samsung 16 gb class 2 micro sd card. But I am not sure if this is a good deal or not? can anyone tell me ?
Thank you,

Class 2 cards are SLOOOOW! I'd much rather spend a few bucks and get a faster one. I wouldn't get anything less than class 6, and usually go for the class 10 cards. Basically, the speed for a class 2 card is 2 MB/s, a class 6 is 6 MB/s, and so on.

bknust said:
Class 2 cards are SLOOOOW! I'd much rather spend a few bucks and get a faster one. I wouldn't get anything less than class 6, and usually go for the class 10 cards. Basically, the speed for a class 2 card is 2 MB/s, a class 6 is 6 MB/s, and so on.
Click to expand...
Click to collapse
Yes that is what I read somewhere. Just wanted to confirm. Thanks for helping me out.
Sent from my SAMSUNG-SGH-I897 using XDA App

Classes only apply to minimum write speed, not read speed, which is far more important.

JPS81 said:
Classes only apply to minimum write speed, not read speed, which is far more important.
Click to expand...
Click to collapse
Right: a Class 2's and a Class 6's speed-differences will only be apparent when copying files to the SD card from the PC.
Samsung 16GB C2 MicroSD
Subtotal : $14.99
Shipping Charges : $4.99
Total Charges : USD$19.98
Yes, that is a good deal. I paid USD$28 for my Sandisk just yesterday, and that was the best deal I could find (on eBay). Mine did come with a USB-reader, though.

waghoba said:
Yes that is what I read somewhere. Just wanted to confirm. Thanks for helping me out.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
Don't be fooled into buying a card on class speed alone - 16gb and 32gb class 6 are very pricey. If you mostly store movies and music on your SD card a class 2 is fine. Even for recording video on the phone, class 2 works fine.
If you are wiping your SD card or filling it with new data all the time, then maybe you want faster write speed - but I would rather save my $$$ for now. The same class 6 cards will be half price in a few months.

alphadog00 said:
Don't be fooled into buying a card on class speed alone - 16gb and 32gb class 6 are very pricey. If you mostly store movies and music on your SD card a class 2 is fine. Even for recording video on the phone, class 2 works fine.
If you are wiping your SD card or filling it with new data all the time, then maybe you want faster write speed - but I would rather save my $$$ for now. The same class 6 cards will be half price in a few months.
Click to expand...
Click to collapse
PhrProfess said:
Right: a Class 2's and a Class 6's speed-differences will only be apparent when copying files to the SD card from the PC.
Samsung 16GB C2 MicroSD
Subtotal : $14.99
Shipping Charges : $4.99
Total Charges : USD$19.98
Yes, that is a good deal. I paid USD$28 for my Sandisk just yesterday, and that was the best deal I could find (on eBay). Mine did come with a USB-reader, though.
Click to expand...
Click to collapse
JPS81 said:
Classes only apply to minimum write speed, not read speed, which is far more important.
Click to expand...
Click to collapse
Thank you for all of you for your replies...but unfortunately the deal was gone by the time I decided to buy
Now waiting for next best deal, at least now I know that just for storing music and vids class 2 is fine !

Go over to G1 forum and search this. Not sure what our phone's max read/write speed is but I am sure its similar to HTC devices- Class 6. You can spend the money on the class 10 but its useless for mobile devices.
Also, some say its only for pc -read/write- not 100% true. however, maybe for our particular phone....
For example- on the dream you can use your SDcard as a swap file placing an EXT2/3/4 partition on it. The class 6 has better performance and longer life than a class 2- i dont recall why exactly but you can easily google it. It was something about after so many read/writes it will burn out the SD but there is more technical factors to it. It has to do with bit allocation and spreading the writes over the card as to continual writing to the same spot- IIRC(dont quote me on that I havent thought about this in a looong time). Now, as this pertains to our devices- well it doesnt really since we dont utilize SDCard swap files and such for our devices. So talking in a circle, I guess for our situation it does only relate to PC writes..

^o hai thx

malfuncion said:
Go over to G1 forum and search this. Not sure what our phone's max read/write speed is but I am sure its similar to HTC devices- Class 6. You can spend the money on the class 10 but its useless for mobile devices.
Also, some say its only for pc -read/write- not 100% true. however, maybe for our particular phone....
For example- on the dream you can use your SDcard as a swap file placing an EXT2/3/4 partition on it. The class 6 has better performance and longer life than a class 2- i dont recall why exactly but you can easily google it. It was something about after so many read/writes it will burn out the SD but there is more technical factors to it. It has to do with bit allocation and spreading the writes over the card as to continual writing to the same spot- IIRC(dont quote me on that I havent thought about this in a looong time). Now, as this pertains to our devices- well it doesnt really since we dont utilize SDCard swap files and such for our devices. So talking in a circle, I guess for our situation it does only relate to PC writes..
Click to expand...
Click to collapse
Hey that's a lot of technical information, but thanks. Now I understood that the class doesnt really matter. So next time if any good deal is out I will just jump on it.
Sent from my SAMSUNG-SGH-I897 using XDA App

Best 32GB microSD Class 10?

Hey
A while back I was looking for a 64GB microSDXC card but sadly I couldnt find any. Ill have to sacrifice and go for a 32GB microSDHC Class 10.
So which is the best (performance and price) 32GB microSDHC Class 10?
Thanks for all the help and suggestions.

how about this
http://www.amazon.co.uk/KOMPUTERBAY...?s=electronics&ie=UTF8&qid=1302552312&sr=1-22
OR
http://www.amazon.co.uk/Storage-Opt...?s=electronics&ie=UTF8&qid=1302552419&sr=1-33
loads more on amazon

tvr84 said:
how about this
http://www.amazon.co.uk/KOMPUTERBAY...?s=electronics&ie=UTF8&qid=1302552312&sr=1-22
OR
http://www.amazon.co.uk/Storage-Opt...?s=electronics&ie=UTF8&qid=1302552419&sr=1-33
loads more on amazon
Click to expand...
Click to collapse
Doesn Amazon uk ship worldwide?

riahc3 said:
Doesn Amazon uk ship worldwide?
Click to expand...
Click to collapse
No, where do you live?

Pokerface1987 said:
No, where do you live?
Click to expand...
Click to collapse
I live in Europe.

riahc3 said:
MOD EDIT: NO EBAY LINKS
Click to expand...
Click to collapse
My apologies Did not know that rule.

More help would be appreciated as Im trying to get all the "parts" to finally complete my mobile purchase

just check the chinese sites like dhgate, dealextreme etc and pay with paypal. sometimes they send fake ones so i would recommend running this program. it will tell you the speed of your read/write so you know the true class and how much actual room it has
http://forum.xda-developers.com/showthread.php?t=1026536

lorijuan1024 said:
just check the chinese sites like dhgate, dealextreme etc and pay with paypal. sometimes they send fake ones so i would recommend running this program. it will tell you the speed of your read/write so you know the true class and how much actual room it has
http://forum.xda-developers.com/showthread.php?t=1026536
Click to expand...
Click to collapse
The problem is that by the time I recieve the card and see that it is fake, I have to send it back (problably pay S&H) then I get my money back...
2-3 weeks. I want something that works period.

riahc3 said:
The problem is that by the time I recieve the card and see that it is fake, I have to send it back (problably pay S&H) then I get my money back...
2-3 weeks. I want something that works period.
Click to expand...
Click to collapse
on ebay they just send another one to not get bad feedback and most likely send the right one or refund the money back and then you get a free sd card out of it

lorijuan1024 said:
on ebay they just send another one to not get bad feedback and most likely send the right one or refund the money back and then you get a free sd card out of it
Click to expand...
Click to collapse
This is assuming there is a problem on eBay. Ive bought several products on eBay and have NEVER had a problem. You just have to know how to buy.
My problem is now knowing which to buy as I just know a few and only the Topram one is avaliable on eBay.

If you're using this for a phone, you may not want a class 10. A class 2 or 4 Sandisk may be better for you. Depends what you're using it for.
Class 10 gives fast sequential speeds, but it usually sacrifices random read, write and access speeds. I could go into the reason why this happens, but I've posted several times about that, so you can check my previous posts for that.
Class 10 is good for digital cameras or other things where sequential speed is important and random speeds aren't important. If you're using the card to run apps off of, or system files for Android, or any OS actually, or using it for WP7, or anything that will need sequential speeds and fast access times, class 10s are slower than good quality class 2 or 4 cards like Sandisk.
Higher class DOES NOT mean better or faster for everything. Class only refers to sequential write speed. Different types of cards are better and faster for different tasks. Class 10s will many times slow down or cause lag in phones, depending on how the phone uses it. Sandisk class 2 and 4 cards I have found to be the best all around cards for phones.

zarathustrax said:
If you're using this for a phone, you may not want a class 10. A class 2 or 4 Sandisk may be better for you. Depends what you're using it for.
Class 10 gives fast sequential speeds, but it usually sacrifices random read, write and access speeds. I could go into the reason why this happens, but I've posted several times about that, so you can check my previous posts for that.
Class 10 is good for digital cameras or other things where sequential speed is important and random speeds aren't important. If you're using the card to run apps off of, or system files for Android, or any OS actually, or using it for WP7, or anything that will need sequential speeds and fast access times, class 10s are slower than good quality class 2 or 4 cards like Sandisk.
Higher class DOES NOT mean better or faster for everything. Class only refers to sequential write speed. Different types of cards are better and faster for different tasks. Class 10s will many times slow down or cause lag in phones, depending on how the phone uses it. Sandisk class 2 and 4 cards I have found to be the best all around cards for phones.
Click to expand...
Click to collapse
Thanks for the explanation but I knew most of this information
The reason I want a Class 10 is that pictures are taken/saved alot faster. Thats pretty much the only reason.

A additional plus is that transfering media thru the cable is also faster.

Ok, well those are probably the 2 biggest reasons to use class 10... using with digital camera and fast transfer speed.
I just wanted to make sure you were getting the right card for what you were using it for. The majority of people seem to basicly think that higher class = better automatically, and don't understand different cards are better for different purposes.

zarathustrax said:
Ok, well those are probably the 2 biggest reasons to use class 10... using with digital camera and fast transfer speed.
I just wanted to make sure you were getting the right card for what you were using it for. The majority of people seem to basicly think that higher class = better automatically, and don't understand different cards are better for different purposes.
Click to expand...
Click to collapse
Yeah I understand thanks anyways.

No more information it seems

zarathustrax said:
If you're using this for a phone, you may not want a class 10. A class 2 or 4 Sandisk may be better for you. Depends what you're using it for.
Class 10 gives fast sequential speeds, but it usually sacrifices random read, write and access speeds. I could go into the reason why this happens, but I've posted several times about that, so you can check my previous posts for that.
Class 10 is good for digital cameras or other things where sequential speed is important and random speeds aren't important. If you're using the card to run apps off of, or system files for Android, or any OS actually, or using it for WP7, or anything that will need sequential speeds and fast access times, class 10s are slower than good quality class 2 or 4 cards like Sandisk.
Higher class DOES NOT mean better or faster for everything. Class only refers to sequential write speed. Different types of cards are better and faster for different tasks. Class 10s will many times slow down or cause lag in phones, depending on how the phone uses it. Sandisk class 2 and 4 cards I have found to be the best all around cards for phones.
Click to expand...
Click to collapse
Very helpful information, zarathustrax!
Didn't know about the random speed part. Thanks for the explanation.

Cayenne Pepper said:
Very helpful information, zarathustrax!
Didn't know about the random speed part. Thanks for the explanation.
Click to expand...
Click to collapse
Related information: http://en.wikipedia.org/wiki/Solid-state_drive
Hit the "Thanks" button if you liked his post
Saw you already did.

Ive (to my surprise) found a Patroit 32GB C10 at a lower price than the Topram.
It looks legit but....you never know.

SD Booster on Ace 2

Has anyone tried SD Booster on the Ace 2? I found a small mention of it in the gaming thread. I was just wondering if it's worth bothering with. I've got a 4GB Class 4 card. The reviews look pretty positive on the Play STore.

dont use it. i used it and it messed up my phone. i ever created a thread here about it and i still havent gotten my phone working because of it. it will seriously **** your phone up and is not worth it.and if anyone reading this knows how to fix it can they please reply on the thread above or send me a message please

me too
you mean like after intalling it and rebooting after takes a lot and when finally booted. evrything force closes.it happen to me also.
the thing that did was factory resret and recover a backup i have taken before.also only a factory reset will work

Interesting. I think I'll give it a miss then! I'm always wary of these alleged 'performance enhancing' apps. I guess for what might only be a small improvement in performance it's not worth the bother. Thanks for the replies.
Does anyone know of any performance boosters that are actually worth bothering with? I mean my phone runs okay, but it's just that temptation to squeeze every last bit of pwer out of it, ha.

for me the best thing i done was rooted it, removed all the crapware that came with it like the network apps and some of the samsung stuff. i installed an app called setcpu which automatically controls the speed of the cpu. set it as profile: screen off and max: 400000 or 200000 min:20000 priority: 100. it works great for me and i can get great times except when i use a 3g connection

i recommend just upgrading your ext sdcard to a class 10,(and swap storages after) would help. (that is, if you can get one.)

teddytsen said:
i recommend just upgrading your ext sdcard to a class 10,(and swap storages after) would help. (that is, if you can get one.)
Click to expand...
Click to collapse
A REAL class 10 card. You can't believe how many off-brand "class 10" cards are on the market that are slower than the class 4 I bought sometime in 2006...

Ryccardo said:
A REAL class 10 card. You can't believe how many off-brand "class 10" cards are on the market that are slower than the class 4 I bought sometime in 2006...
Click to expand...
Click to collapse
Lol. Mines a sandisk . Ive never encountered fake class 10. Fake ones i saw were class 4 i think..
Sent from my GT-I8160 using Tapatalk

Thanks again for the tips guys, might look into that. ANd I'll be avoiding Sd Booster!