[MannyZ28]

So I downloaded SD card speed test from the market. The first time I ran it the phone had been on all day and I did all sorts of stuff with it. It only scored 1 mb/a write and 4 read. I restarted the phone and ran the test again, this time it dis 11 write and 14 read. This is a 8 gb class 4 card. This does prove though how android can bog down quite a bit with every day usage.

Anyone want to check the speed of their card? Download the app and share your scores.

[pwnst_r]

Are you talking about "SD Card Speed Tester"? That's the only one I seem to be showing.


8GB Class 2:

Write speed 3.0MB/s
Read speed 6.0 MB/s

Evo was rebooted shortly before that though and before I saw this thread. I'll test again tomorrow.

[Android Believer]

I did 3 different tests on my 16GB class 6 card. 1st: Class 4 5mb/s write, 11mb/s read. 2nd: Class 6 6mb/s write, 13 mb/s read. 3rd: Same as 2nd test.

So I'd say it was pretty right.

[MannyZ28]

Yes it is tester. Hm interesting results.

[mansouan]

Great thread guys, can you all please post brands as well so that those of us lurking can develop an opinion on what microSD cards work best with the Evo? Thanks.

[MannyZ28]

Mine is a Sanddisk 8 GB Class 4.

To make the procedure a bit more standard, please reboot your phone before running the test.

Looking at what other results have been posted so far, I am impressed by my card!

I just ran it again, this time without a restart. Did some browsing and used NewsRoom a bit, but that's about it, result was 11 write, 15 read.

I guess that means the Evo can actually support the speed of a class 10 card?

[apexi350z]

A-DATA 16GB Micro SDHC Class 6 (Newegg.com)

Write speed is 8.0MB/s
Reading speed is 13.0MB/s

[MannyZ28]

Anyone else?

[tekmunki]

End of Day Test:
Write: 1.0 MB/s
Read: 13.0 MB/s


SanDisk Flash memory card - 16 GB MicroSDHC - 1 x microSDHC (Class 2)

[Civ2boss]

Do you guys format your SD cards before using them? I found out that using the normal formatting tools in like Windows, don't give the cards maximum performance. Like the cards would lag a little when read from. I now always use this SD formatter whenever I buy new SD cards:

[tekmunki]

I formatted using the Win7 full format. It may explain the slow write; I'll power down the phone- back up the data, format it in the droid and then copy the data over; I'll re-test and we'll see if there's any difference at all.

[tekmunki]

Windows 7 64-Bit Pro Formatter:
End of Day Test:
Write: 1.0 MB/s
Read: 13.0 MB/s

Windows 7 64-Bit Pro Formatter:
Fresh Reboot:
Write: 1.0 MB/s
Read: 13.0 MB/s


Using the Built-In Phone Formatting:
Fresh Reboot:
Write: 6.0 MB/s
Read: 13.0 MB/s

A rather noticeable difference!!

edit:
Now, using the Recommended SD Formatter Above: (Full Erase, Format > This took a while...)
Fresh Reboot:
Write: 6.0 MB/s
Read: 13.0 MB/s


Looks like the phone and SD formatter are about even; still- good to know not to use the windows formatter.

[Civ2boss]

Now, using the Recommended SD Formatter Above: (Full Erase, Format > This took a while...)

You can use the quick format actually, for new cards anyway I didn't test cards already with data on it.

[MannyZ28]

I formatted my card using the phone.

[Aspiring Developer]

Love this thread! I've been trying to find what is the upper Class rating capability of my Nexus One SD card. Why don't manufactures publish these specs? Prior to perusing the HTC forums I'd never even heard of the speed distinction in SDCards. I wonder now about my regular digital cameras if the picture taking is so slow simply because of (unknown class) cards.

[MannyZ28]

Love this thread! I've been trying to find what is the upper Class rating capability of my Nexus One SD card. Why don't manufactures publish these specs? Prior to perusing the HTC forums I'd never even heard of the speed distinction in SDCards. I wonder now about my regular digital cameras if the picture taking is so slow simply because of (unknown class) cards.

If it was a cheap card, and I assume it was since they didn't even bother putting the class on it, then yes, thats the reason why taking picture is so slow. Seeing how modern cameras can produce files in the megabyte range, you will definitely feel the wait while the file is written onto the card.

[Deathwish238]

I formatted my card using the phone.

I think I did too...you would hope that would be as good as it gets! But my class 6 seems to be writing at 1.3 MBps when copying files from Windows to the SD Card.

[k2ldc10]

Newbie question alert! I am looking to get a larger card for my EVO. When I put the new card in, where do I find the utility to format the card, and does that put the needed folder structure on the card? Or, as you do something like take a picture, does the phone create the folder it needs on the fly?

[wadester]

First run - Write: 1.0MB/s, Read: 3.0MB/s, "ClassUnknown" (Factory 8GB)

After reboot - Write: 2.0MB/S, Read 3.0MB/s, "Class2" card ((

[alreegator#ac]

Write: 2.4 MB/s
Read: 10.7 MB/s
-No reboot after moderate usage with a stock card.

[splmonster]

This is why they warn you of cheap SD cards. A good majority never live up to the class they are rated for. Always make sure to buy good brands.

[jrun]

Guys, i can't find "SD Card Speed Tester" in the market? I see SD Card Tester for $2.00, thats the closest thing. Is the app you are using called something different? Is it a free app?

I've got a 32gb Class 10 card from Lexar that i'd like to test for you guys