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?

What MicroSD Classes Work with the Desire...?

My question was concerning my 16gb Class 6 card (which actually appeared to be corrupt/broke'd anyway)
I asked about compatibly with the Desire...
htc said:
Thank you for contacting us.
In regards to SD Cards
I can help you with that.
The card that you are trying to use is not compatible with the phone as the class is too high speed for the device to be able to keep up with the speed. I have included a link to a webpage with the sd cards that are compatible with that device.
http://www.expansys.com/a.aspx?i=196001
If you look under the accessory tab then down the bottom is compatible memory.
I trust that this resolves your query, please do not hesitate to contact us again if required.
To send a reply to this message or let me know I have successfully answered your question log in to our ContactUs site using your email address and your ticket number XXXXXXXXXXXXXX.
Sincerely,
HTC
Click to expand...
Click to collapse
I'm sure I read some threads about class 10's working fine in the Desire?
The link seems to suggest only a class 2 or a class 4 will work...

I'm using a class 4 without problems so far.
On a dutch board I read a guy was using a class 6 on Starbust so it should be possible I think.

I've just bought a 16gb class 4 Sandisk and the speed tests show it as being quite a bit faster than my class 4 (non Sandisk) 8gb card!

I'm using class 4, working fine

I'm using a 8GB class 6 card with Custom ROM and A2SD with no problem. Been over 6 months now.

A lot of class 10 cards have issues, class 6 seems to be the most reliable thus far. Some people have had good experiences with A-DATA 16gb class 10.

So from user experience - a good Class 6/10 card should work just fine?

Lothaen said:
So from user experience - a good Class 6/10 card should work just fine?
Click to expand...
Click to collapse
Yes, it should. Have no problems, with mine

Lothaen said:
So from user experience - a good Class 6/10 card should work just fine?
Click to expand...
Click to collapse
For C6 yes.
For C10 Mostly yes... but usually class 10 is not really faster... so save the money.
Just my two cents.

I'm using Transcend 8GB class 6 without any problem. Try to format by gparted or similiar. Are you using it for any other purpose than storing photos, music or etc? For example for data2sd or apps2sd?

I just bought a transcend 16gb class 6, working perfectly so far with no problems.
Sent from my HTC Desire using XDA App

Bartyzel said:
I'm using Transcend 8GB class 6 without any problem. Try to format by gparted or similiar. Are you using it for any other purpose than storing photos, music or etc? For example for data2sd or apps2sd?
Click to expand...
Click to collapse
I bought a 16gb class 6 to use with data2sd but struggled as the card was broken - so i've sent it back and just have the 8gb class 2 that i got with my phone now - and on stock rom again, so it is just photos and music and froyo app2sd at the moment

basically all branded cards will work fine, the thing you shoud be concerned more onthe capacity you are gonna use. It aint worth buying a 16GB sd when u cant fill even half of it with useful stuff

If speed is your thing then get a class 4 or 6 but I had SD mounted as read only with a class 4 8 gig Kingston SD, so I swooped with a buddy of mine for a class 2 SD from a Nokia n95, no problems since then.
Sent from my HTC Desire using XDA App

[Q] Class 10 MicroSD Issues

Hello, I bought some day ago a Team 16GB class 10 Micro SD card, but my Defy freeze, expecially when I browse it with quickpic.
I see some thread about class 10 cards and someone found that a partial fix is format with 32k or 64k as file allocation unit size, and maybe another fix is set higher voltage with setsvel.
I've tried the format fix, but I gain only speed, now I'll try the second to gain the needed stability.
I read also that it's an Android kernel related issue, so we still need an official fix.
Someone know some other method?
D_L
Edit: Also the voltage tweak have failed... It's frustrating...

There maybe something related to the manufacturer. For example in my country the cheepest MicroSDHC Cards are made by Adata and Serioux (there maybe other chinesse brands but these are present at known big IT stores).
So people bought them, especially Adata ( which should be better than Serioux).
Class 6/10... and they ended up not working.
So my advice is to try with a Knigston/Kingmax/Transcend/ Sandisk( not that cheap) same 16gb and same class, see if you see a difference.
And i think Class 6 is enough... if let's say Class 10 from the manufacturers above it too expensive.
Maybe it helps.

Transcend?? um.. i don't think so, it's just the same.
perviously i had Transced 8 GB class 6,
using my old galaxy android, it's so fine and speed is good.
but after went to Defy, it was horrible.
often to cause hangs!
have to unmount / remount, which often not succeed, and have to pull out battery.
and it's especially happen when taking picture with camera or downloading + listening to mp3.
many good moments missed, can't take picture, because have to pull out the battery,
and that's embarassing, in front of my friend.
they think i have a smartphone but often hangs,
and now i know it is just because highclass sdcard.
i am using class 2 sdcard now, never get hangs.
end of problem.

I had the same problem.
I bought a 16GB class 10 SDHC ab. a month ago and when I'd been using my Defy always been freezed when I opened the Gallery or any else card related application.
I deleted the partition on the card and created a new one without LBA mode and the problem had been solved temporary. After a week it was start to make freezes again.
Actually I'm using a 16GB class 2 one (I bought it for 15 pounds as used). There's no problems any more, and it works as the same speed as the class 10 one (by the SD Tools).

I gave up and went back to a class 6 8GB Samsung, i did start a thread on the official Motorola forum if you want to go let them know about the problems, it might get them to issue a fix if more people start to complain about it. https://supportforums.motorola.com/thread/53050?tstart=30

i tot only me..
same here..
wanna sell my DNA 16GB class 10.
phone hang quite easily after change to this

So i want to buy a 8 gb card class 4 or 6 tomorrow... and it must work would CM7 . What to get ? I understand that using Sd booster or CM7 default i should get the same speed acordingly to what i set ?
Sent from my MB525 using XDA Premium App

Deonix said:
So i want to buy a 8 gb card class 4 or 6 tomorrow... and it must work would CM7 . What to get ? I understand that using Sd booster or CM7 default i should get the same speed acordingly to what i set ?
Sent from my MB525 using XDA Premium App
Click to expand...
Click to collapse
Hi Deonix.
My SD is a SanDisk 8GB class 4 and working well.
A couple days a go i try to use my other SD 16GB (class 10) and had issues, so i back to the 8GB class 4.
Some users have 16 and 32GB class 2 and 4 and they have no problems.

Thanks... i will choose a class 4 probably Kingmax. Anyone with working Class 6 8gb? what manufacturer?
Question: i will have on my 8 gb card a bunch of apps-30-40... some games including Asphalt 6 < for example>, MotoNav, and music. Out of this i think i will still have 2-3 Gb free . I don't need to transfer data from Card to PC frequently (fast i mean) maybe when it happens i will use the phone as a mass storage.
The question is: Do i need a class 6? I only need to work properly while in the phone and have a decent speed as a Mass storage from time to time.

definetely is not cm7 problem,
i thought it was.. and many people thought it too.
maybe it's froyo kernel seems little bit buggy with hiclass sdcard.
and cm7 using froyo kernel though.
using class 2 sdcard is perfect.
the speed is just the same though.
have been checked with some bencharking tools.

Both me and the missus are using class 6 samsung cards this one to be precise http://www.amazon.co.uk/Samsung-Micro-Speed-memory-Class/dp/B002WGIV10/ref=pd_rhf_shvl_44 and it works greatSD tools shows a write speed of around 10MB/s and a read speed of around 21MB/s

actually, i'll buy SD Card Team 16 Gig class 10..
any problem with froyo for class 10 ?
need more advice from u guys

Garincha13 said:
actually, i'll buy SD Card Team 16 Gig class 10..
any problem with froyo for class 10 ?
need more advice from u guys
Click to expand...
Click to collapse
many people confirm there's a problem with that,
even with 6 class sdcard.
i don't know what's going on but it's happening and annoying,
it happens on froyo, and CM7 too (FYI, CM7 Quarx uses froyo kernel).

Garincha13 said:
actually, i'll buy SD Card Team 16 Gig class 10..
any problem with froyo for class 10 ?
need more advice from u guys
Click to expand...
Click to collapse
Thats what we are all saying, class 10 cards seem nothing but a problem regardless of size. This is why i went back to the class 6 samsung and posted a link to it cos i know it works.

Just bought a 8 gb Kingston class 4. Will report speed and any other issues as soon as i install CM7 with it.
Hope it works well. It's an Android Kernel issue from Froyo on the Class 6/10 crashes as i can understand.. nobody's fault ( here on XDA i mean). Still some work.
Also i remain strong on my position.
Choose your manufacturer wisely even if it costs 10-20$/i dunno how much more.

I use kingmax 16gb class10 allways hang,
so bad,
use class 4 or 2 batter
Sent from my MB525 using XDA Premium App

i nearly bought a 16GB Lexmark class 6 card today but i dare not in case it didnt work, this is a crap situation.

Same here - Froyo 2.2.2 and Transend 16GB Class10 - freezes at random basis and random applications. No issues with 8GB Class 4.

I have similar problem, how do I know the class of the card? It is I believe a Kingston, I've had it for ages.
Also if it is relevant to someone, I have a Defy from CEE distribution, with Froyo.

Fabo.sk said:
I have similar problem, how do I know the class of the card? It is I believe a Kingston, I've had it for ages.
Also if it is relevant to someone, I have a Defy from CEE distribution, with Froyo.
Click to expand...
Click to collapse
You can check if the class is printed on the card. Usually it is a number inside a letter "C" (like a full circle).
You can see the images here:
http://en.wikipedia.org/wiki/Sd_card#Speed_Class_Rating

[Q] Anyone here use a Class 10 SD card for Android?

I'm looking to upgrade the crummy 1GB SD card in my wife's TP2 to something faster. I was wondering if buying a class 10 card was worth it or if I should just stick with a class 6 or lower. Does the SD slot in the TP2 even support a class 10 card? Would a class 10 card be noticeably faster than a class6?

Not for this project. IIRC Nate said class 4 seems to be the sweet spot, the higher the class the worse it would be running XDandroid, but even some class 4's work better than others. Walmart has 16G class 4 sandisks for around $20, not too bad if you ask me

benutne said:
I'm looking to upgrade the crummy 1GB SD card in my wife's TP2 to something faster. I was wondering if buying a class 10 card was worth it or if I should just stick with a class 6 or lower. Does the SD slot in the TP2 even support a class 10 card? Would a class 10 card be noticeably faster than a class6?
Click to expand...
Click to collapse
C10 cards are supported, but some have had issues. I would not recommend a C10 card for Android use. I doubt the phone itself will be any faster...

fishingmedic said:
Not for this project. IIRC Nate said class 4 seems to be the sweet spot, the higher the class the worse it would be running XDandroid, but even some class 4's work better than others. Walmart has 16G class 4 sandisks for around $20, not too bad if you ask me
Click to expand...
Click to collapse
Ah, OK. I'll grab a class 4 from Newegg then. I was looking at a class six.

arrrghhh said:
C10 cards are supported, but some have had issues. I would not recommend a C10 card for Android use. I doubt the phone itself will be any faster...
Click to expand...
Click to collapse
Cool. Thanks. So get a class 4 then? Is it worth it to get a 16 over a 8GB? My wife doesn't put much on her phone really and she streams all of her music.

Yeah I've got a Patriot 16Gig Class10 SD card that I picked up on sale months ago. I have been running XDAndroid on it since then and haven't noticed any benefit over my old 4gig class 2 card.
Not sure if it's related to running andriod but at first I was having issues with the card corrupting and losing all data on it, having to format it to be usable again. Formatting a few times with the HP tool seems to be helping.
I had a similar issue with my last phone (HTC Hermes) which would only work with good quality (Sandisk) SD cars, and failed with cheap chinese flash memory. The issue was that the phone wasn't able to remount the card properly in winmo when coming out of sleep, and the filesystem would become corrupt pretty quickly with folders disappearing and files having wacky filenames. Sounded like it was more of a hardware issue than anything.

benutne said:
Cool. Thanks. So get a class 4 then? Is it worth it to get a 16 over a 8GB? My wife doesn't put much on her phone really and she streams all of her music.
Click to expand...
Click to collapse
Yea I use a class 4 card. Some have reported oddness with class 6, so it seems like the type of card matters as well... Because others with C6 cards say they work just fine. I've even had some people say C10 cards are fine, but most seem to have issues with C10 cards. Don't get some cheap knockoff, get a name brand.
As for size, that's entirely up to you. You can have up to a 32gb card. 512mb minimum .

ReeS86 said:
Yeah I've got a Patriot 16Gig Class10 SD card that I picked up on sale months ago. I have been running XDAndroid on it since then and haven't noticed any benefit over my old 4gig class 2 card.
Not sure if it's related to running andriod but at first I was having issues with the card corrupting and losing all data on it, having to format it to be usable again. Formatting a few times with the HP tool seems to be helping.
I had a similar issue with my last phone (HTC Hermes) which would only work with good quality (Sandisk) SD cars, and failed with cheap chinese flash memory. The issue was that the phone wasn't able to remount the card properly in winmo when coming out of sleep, and the filesystem would become corrupt pretty quickly with folders disappearing and files having wacky filenames. Sounded like it was more of a hardware issue than anything.
Click to expand...
Click to collapse
I have a Patriot 16GB C10 card here too, but I no longer use it. It was constantly getting corrupted, the kernel logs were filled with I/O error messages. I'm now on a Sandisk 32GB C4 card and no more problems.

highlandsun said:
I have a Patriot 16GB C10 card here too, but I no longer use it. It was constantly getting corrupted, the kernel logs were filled with I/O error messages. I'm now on a Sandisk 32GB C4 card and no more problems.
Click to expand...
Click to collapse
What about Kingston? There are a lot of those available at Newegg.

benutne said:
What about Kingston? There are a lot of those available at Newegg.
Click to expand...
Click to collapse
Just don't get a C10 card... I think that's what people should take away from this.
Some have said C10 cards are fine, but most say they are not. A few have had issues with C6 cards, but most say those are OK. I've never heard of people complaining about C4 or below cards - hence the reason I recommend anything C4 or less.

c10 sd android
My company name is WinDroidz and all I do is mod android and windows devices... and I have always seen huge performance gains with c10 cards, c2 sucks major, its just the transfer speed the card can move data at and clearly more speed no matter how u look at it with an SD card. Is crucial... I always used patriot c10, or topram and pqi c6 cards for android SD on windows devices and have only seen a posative result.. this is based on my personal experience of Modding more Devices then I can remember.... not from what I read somewhere or was told by someone... SD card data transfer is the slowest method of data transfer of all other common used methods... there are graphs if u Google it that show sdhc c2 cards lined up against other transfer methods like USB, ide, sata etc..... to put in perspective how ridiculously slow SD cards really are, once u see that u will understand why your phones drags ass so much when trying to pull up gallery after cache has been wiped if you have a ton of pics etc.... so if u are having problems with a higher class SD its probly not the SD and is something else you are doing, or maybe the brand as I can only vouch for the ones I've used... (wouldn't care personally about brand as pretty much everything is same manufacturer with restamped brand and packaging.. Kingston is Japan... currently using a c4 Kingston 32gb in my desire HD (wish it was a c10 but kinda pricey for that size and brand) I recommend c10 8gb for $30 on Amazon if u are using some kind of android SD rom.. or any device if u want better transfer speeds and it is very noticeable... no matter what speed u get though it will never run like nand android.. like HD2. So lets just hope the nand development for other devices continues like clk or magldr did for hd2 cause the hd2 with clk and full rom manager support is amazing

16GB class 10
Using 16GB class 10 and have had no problems related to the card, with FRX07.
I personally cannot think of any logical reason why a class 10 card of good quality should ever be a problem.
I just installed and ran Angry Birds Rio. It is slow, but works. Kind of fun to play in slow-mo!

i use 8gb c6 and haven't had any problem so far.

My 16GB RiDATA Class 6 Micro SD has been great, no problems.

32g microsd

I bought a 32g microsd class10,but the problem is when i try to pass all my files from my other microsd,there a missing files like clockworkmode,and i cant open some of my pictures,i put the micro sd in my inc2 and download the clockworkmode from alpharef or rom manager and i can see the file but incomplet also if i try to pass my stock rom i can see the process but whn i open the clockworkmode and look in the save file there not any stock rom in there,if try to go in to recovery mode dont let me jist reboot and i have to select reboot.if ltry to save my current rom using rom manager its look like is doing something but the download bar dont do nothing,and then i check the saved rom and its in the file but imcomplite i dont know what to do with....thanks...

What is the brand on the card? It may look good, at 32gb class 10, but if its not from a decent manufacturer it may not be worth the small price you paid.
Personally, I stick with pny or sandisk.
Sent from my DInc2

Try formatting the card.

FC127 said:
What is the brand on the card? It may look good, at 32gb class 10, but if its not from a decent manufacturer it may not be worth the small price you paid.
Personally, I stick with pny or sandisk.
Sent from my DInc2
Click to expand...
Click to collapse
yea you are right the card is not for a decent manufacturer,but I e-mail the guy and he gave my money back and he told me that i can keep the card.there are not pny 32g class 10,I can find 16g but not 32g,thanks...

TheAtheistReverend said:
Try formatting the card.
Click to expand...
Click to collapse
I did that but nothing change,I tried the card in a unrooted droid inc1 and there ate not differences.but what im going to do is save all videos and photos in my laptop and start from cero,taking pictures,videos,ect,ect,ect,and i will let you know guys........

FC127 said:
What is the brand on the card? It may look good, at 32gb class 10, but if its not from a decent manufacturer it may not be worth the small price you paid.
Personally, I stick with pny or sandisk.
Sent from my DInc2
Click to expand...
Click to collapse
I bought another microsd 32g class 10, But this one is PNY and work great i dont have any issue transfering my files.I boughted in Newegg.

Thanks for the FYI on Pny.
I know they are a cheaper brand(price-wise) so I tended to avoid them for more name-brands.

is it a simple COPY > PASTE affair to upgrade to a new card?
i read in the past that other phones used the sd card for swap and such, which needed different procedures to upgrade but the Inc2 doesn't have any of that dependency
i picked up a 32GB Class 4 Sandisk card which should be arriving tomorrow. Hope the upgrade goes as smooth as yours
ps. you should do some benchmarks of your pny class 10 vs the OEM card. as i understand it, the sd controller in our phones aren't rated for class 10 speeds, which is why i didn't bite on the faster (more expensive) class 10 card. it would be interesting to see a comparison though.
you can use something like AnTuTu Benchmark or SD Tools. both available from the market.

junknstuff said:
ps. you should do some benchmarks of your pny class 10 vs the OEM card. as i understand it, the sd controller in our phones aren't rated for class 10 speeds, which is why i didn't bite on the faster (more expensive) class 10 card. it would be interesting to see a comparison though.
you can use something like AnTuTu Benchmark or SD Tools. both available from the market.
Click to expand...
Click to collapse
This. a class 10 is kinda pointless for a phone. i remember reading somewhere on here about how any card above a class 6 will slow the phone down.
Also that off brand sd card was probably not a 32gb nor a class 10.
I bought something similar off ebay a while back and it ended up being a card that was labeled 32gb class 10 but the benchmark stated it was a 200mb class 2 or something like that. They take these already labeled 32gb class 10 cards which failed the test off the line and resell them as such although they are not.
glad you got your money back

i used AnTuTu Benchmark with the OEM 16gb class 4 card.
read: 4.4 MB/s
write: 16.6 MB/s
the Sandisk 32GB Class 4 card I picked up, according to the reviews, have above-standard write speeds for a Class 4 (something like 5-6MB/s). i'll post up scores when it gets in but i would suggest this one just for it's brand name and consistent reviews
http://www.newegg.com/Product/Product.aspx?Item=N82E16820171487

Buy that card from Taobao?

hey guys. i have been trying to migrate over to the 32GB sandisk card without luck. the file transfers over just fine but my phone can't identify where the apps are (the card is recognized in the phone, including the full capacity).
i'm trying to resolve this before doing the benchmark. any help is appreciated!
Ps: i just copy>pasted from the old card to the new card. nothing fancy and no errors. and yes i do use App2SD

junknstuff said:
hey guys. i have been trying to migrate over to the 32GB sandisk card without luck. the file transfers over just fine but my phone can't identify where the apps are (the card is recognized in the phone, including the full capacity).
i'm trying to resolve this before doing the benchmark. any help is appreciated!
Ps: i just copy>pasted from the old card to the new card. nothing fancy and no errors. and yes i do use App2SD
Click to expand...
Click to collapse
Did you unmount the old on from your phone, stick the new one in and format the new one first?
Sent from my Mikrunny'd Superphone using Forum Runner

junknstuff said:
hey guys. i have been trying to migrate over to the 32GB sandisk card without luck. the file transfers over just fine but my phone can't identify where the apps are (the card is recognized in the phone, including the full capacity).
i'm trying to resolve this before doing the benchmark. any help is appreciated!
Ps: i just copy>pasted from the old card to the new card. nothing fancy and no errors. and yes i do use App2SD
Click to expand...
Click to collapse
Did you try rebooting after you put the card in
Sent from my Incredible 2 using xda premium

buy a new card,hehe

I think,the problem is the sd card, i had problem before with the first 32g sd card but when i purchase a 32g pny sd card class 10..i could swipe everything whit no problems.