Database Develop

Memory Card Benchmarks 2gb v 16gb

All,
Just thought i'd let you know the benchmarks I got from the exisiting 2gb card and a new 16gb card I've bought.
The card I've bought is the new Sandisk Class 4 Ultra micro sdhc which cost me £50 from Amazon.co.uk. I was a bit sceptical at first as the 2gb seemed quite fast so wondered what class it was as it doesn't say and I didn't want the new card to be slower. But I went ahead and bought it anyway as i needed the space.
Both cards are formatted to fat32 with 4096 of allocation
So, CrystalDiskMark benchmarks...
100mb file, 3 passes...
Code:
100mb file Sandisk 2gb Sandisk 16gb
Read Write Read Write
Sequential 10.67 6.639 19.93 16.57
Random Write 512k 10.55 1.261 19.52 2.634
Random Write 4k 2.822 0.010 3.984 0.026
Speeds are in MB/s
Quite a bit faster than I was expecting, so quite happy about this. I know there will be some hardware limitations in the phone so it can only read / write at certain speeds, but for taking pictures, it can save the images quicker and thats a plus for me. Plus the reading of data in music player etc...
Hope it helps some people

nicelad_uk said:
All,
Just thought i'd let you know the benchmarks I got from the exisiting 2gb card and a new 16gb card I've bought.
The card I've bought is the new Sandisk Class 4 Ultra micro sdhc which cost me £50 from Amazon.co.uk. I was a bit sceptical at first as the 2gb seemed quite fast so wondered what class it was as it doesn't say and I didn't want the new card to be slower. But I went ahead and bought it anyway as i needed the space.
Both cards are formatted to fat32 with 4096 of allocation
So, CrystalDiskMark benchmarks...
100mb file, 3 passes...
Code:
100mb file Sandisk 2gb Sandisk 16gb
Read Write Read Write
Sequential 10.67 6.639 19.93 16.57
Random Write 512k 10.55 1.261 19.52 2.634
Random Write 4k 2.822 0.010 3.984 0.026
Speeds are in MB/s
Quite a bit faster than I was expecting, so quite happy about this. I know there will be some hardware limitations in the phone so it can only read / write at certain speeds, but for taking pictures, it can save the images quicker and thats a plus for me. Plus the reading of data in music player etc...
Hope it helps some people
Click to expand...
Click to collapse
quite an impressive hike in write speeds.
I did wonder about the transcend class 6 they have for £55 but then I realised it said 2-3 months expected delivery !
In the end I bought the PNY 16gb card from play for £26 it's supposed to be a class 4 I'll benchmark it when it arrives.

quite impressive
congrats mate for the new card
However, i guess it makes more sense if the larger card volume was a bit slower!
Anywayz, doesnt the bigger card have any negative effect on the battery in terms of consuming more power to mount the storage volume?

Interesting - I have a 16Gb Class 6 on it's way - should be here next week. I'll try and run the benchmarks for it and see if there is much difference.

would be nice if someone could try the class 2 sandisk 16 gb
how did you do the benchmark?

fards said:
quite an impressive hike in write speeds.
I did wonder about the transcend class 6 they have for £55 but then I realised it said 2-3 months expected delivery !
In the end I bought the PNY 16gb card from play for £26 it's supposed to be a class 4 I'll benchmark it when it arrives.
Click to expand...
Click to collapse
PNY card class 4 - where from?

I too have a class 6 16GB card on it's way and I will post my bench's as soon as it gets...

I won't buy a higher one than my 8GB one till a 32GB is released -.-

gavinfabl said:
PNY card class 4 - where from?
Click to expand...
Click to collapse
PLAY..
play.com here > >http://www.play.com/Mobiles/Mobile/4-/11540450/PNY-16GB-Micro-SDHC-Memory-Card/Product.html
the article says class 2, the review says class 4. One of my friends bought one, his is class 4.
Obviously I won't know till mine arrives !
the PNY site isn't much help
http://www.pny.eu/products.php?section=product&categoryid=4&subcategoryid=54&productid=296

Sandisk 8gb class 4 test results (similar to the 16gb class 4)-
Code:
--------------------------------------------------
CrystalDiskMark 2.2 (C) 2007-2008 hiyohiyo
Crystal Dew World : http://crystalmark.info/
--------------------------------------------------
Sequential Read : 20.268 MB/s
Sequential Write : 16.100 MB/s
Random Read 512KB : 19.866 MB/s
Random Write 512KB : 3.009 MB/s
Random Read 4KB : 4.124 MB/s
Random Write 4KB : 0.028 MB/s
Test Size : 100 MB

an idea for you all..... check your local cash converter/pawn shop. i found a lot of micro sdhc card in there.
got my self a samsung 8GB class 6 for 12.00 pounds ! (with 1 year warranty)
they also had a 16gb class 2 for 22 pounds.

Two more cards
I was using the Sandisk USB to MicroSD adapter that ships with Sandisk cards.
I get the feeling that this is limiting the benchmark results
I get
Sandisk 8Gb Class 4
Read Write
SEQ: 19.69 13.19
512k: 19.26 2.337
4k: 3.601 0.021
Kingston 16Gb Class 2
Read Write
SEQ: 19.61 6.729
512k: 19.39 1.091
4k: 3.567 0.024

Sorry guys, but I don't get it. If you buy a card to use it with your Leo these tests are pretty irrelevant. I tested myself several cards, 2GB, 4GB and 16GB, class 2 and 4, both in my PC using ATTO benchmark and in my Leo. I came to the conclusion that a class 2 micro SD card is plenty fast enough when reading/writing with the Leo, so what is the point of spending a little fortune on class 6 cards? The Leo is no high-end DSLR you know...
Using happily a 16GB Sandisk that I purchased in my local PC shop for about 35 Euros. The Leo peaks at 5.2/8.6 MB/s write/read with this card. It did exactly the same with a class 4 4GB Toshiba card and a 2GB class 4 Kingston card. Tested using ATTO Disk Benchmark v. 234 on a core i7 system running Windows 7 64 bit OS.
In my view, the ATTO benchmark is reat because it gives you a speed snapshot at different file sizes, not just the peaks. I wonder what file size is used when manufacturers clasify their cards. Let me tell you, when transfering files smaller that 1 KB, they're all bloody snails, from class 2 to class 12!

atomic_dude said:
Let me tell you, when transfering files smaller that 1 KB, they're all bloody snails, from class 2 to class 12!
Click to expand...
Click to collapse
I hear that, took ages to delete Igo8 off the SD card with all those small files
I prefer the faster cards, say class 4 or even a class 2 if it can perform like this current class 4 because I don't just use it in my phone. I use the card reader and transfer music / videos / pictures etc and with the clip battery cover, it only takes a minute to hot swap.
I know what you mean though, the phone does have limitations which make the cards only work to a certain speed, thats the same in most devices.
All in all though, nice to get some comparisons on here for people who want to know before they buy

16gb card came from play today.
It is class 2, clearly marked as such, so either they are sending out from different sources or something is up.
Either way it's a pretty quick card, I'll benchmark it later on

I was waiting for a 32gb card to be released but that doesn't look like it is going to happen any time soon...
So I am buying a 16gb card. I am going to be using the card in my phone only. Out of these 2 cards which would recommend -
16gb Kingston class 4 or a 16gb Peak class 6 (for a couple of pounds extra)
Part of me wants to go for the class 6 for the speed (but will I really notice it in a phone?) but on the other hand Kingston is a well known brand and I have never heard of Peak.
Thanks

What would you say is the minimum class that i could get a decent experience when playing music/movies and launching apps?

A class 2 card would do the job nicely.

Thanks, will probs get a class 2 16GB one

fards said:
16gb card came from play today.
It is class 2, clearly marked as such, so either they are sending out from different sources or something is up.
Either way it's a pretty quick card, I'll benchmark it later on
Click to expand...
Click to collapse
Took your advice and bought the 16gb one you recommended from play too in the hope it was Class4. No idea what Class it actually is but its definately quicker than the previous 2Gb, and 8Gb cards I had in it! - I can tell cus when I wizz through the photos in landscape mode they appear almost instantly whereas the other cards took time to load them up. or maybe thats cus of this new ROM - I'm not sure.....hmmm....

32GB microsd cards coming soon?

Since I've bought my Omnia II I've been looking forward to getting a 32GB microsd card which the device claims to support. Only problem is that they don't exist yet and I can't find any information on when I can expect them to be in the market, or how much i'll be expected to shell out for one.
Anyone else holding out for a 32GB card? 16GB is a lot, but not nearly enough to hold all my music, let alone having room left for taking photo's/videos.

hopefully in a few months ,according to this http://www.engadget.com/2010/01/13/samsung-announces-64gb-movinand-flash-32gb-microsd-card/

I wouldn't hold out for anything...
Matt174e said:
Since I've bought my Omnia II I've been looking forward to getting a 32GB microsd card which the device claims to support. Only problem is that they don't exist yet and I can't find any information on when I can expect them to be in the market, or how much i'll be expected to shell out for one.
Anyone else holding out for a 32GB card? 16GB is a lot, but not nearly enough to hold all my music, let alone having room left for taking photo's/videos.
Click to expand...
Click to collapse
32GB microSDHC has been "coming soon" since 2007...and we're STILL waiting.

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=180478266772&ssPageName=ADME:X:AAQ:AU:1123
SanDisk 32GB class II microSD, anyone tried?

technillion said:
32GB microSDHC has been "coming soon" since 2007...and we're STILL waiting.
Click to expand...
Click to collapse
The new crop of microSD cards are getting ridiculous storage capacities for something this small - step back 16GB microSD cards, the 32GB cards are coming to town. SanDisk just might be the first to release microSD cards of this capacity.
By the way, this is the Swan song of microSDHC - they are capped at 32GB capacity. Coming to replace them will be the microSDXC variety (XC stands for "extended capacity").
Getting back on topic, SanDisk will release the world's first 32GB microSD cards next month and their price is expected to be 200 US dollars (150 euro), which obviously includes he early adopter's fee and the bragging rights that come with it.
We're joking of course, but 16GB microSD cards from SanDisk can be had for as low as 40 bucks - buying a phone with a hot-swappable card slot sounds like a good idea, doesn't it?
But if you absolutely must have one, you'd need 200 dollars by next month when these cards start shipping.
Source 200$?? LOL,,LET OBAMA PAY FOR EVERYONE OF THEM

SanDisk Launches 32GB MicroSDHC Card

Nazar78 said:
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=180478266772&ssPageName=ADME:X:AAQ:AU:1123
SanDisk 32GB class II microSD, anyone tried?
Click to expand...
Click to collapse
i use "SanDisk 16GB class II microSD" very fast, no problem.

Hai everybody, i am a new member to forums, so i am intereseted
and want to gain knowledge on this topics..........................thank u

I'm using SunDisc 32 Gb class 2 without any problem. It is not very good for watching films from it because 2 class (slow for film streaming with high bitrate), but for data, photo and music it is very nice. I copy film from card in to internal (8 Gb) memory and watch it.

32GB micro SD class 10, the best!

be carefull about sd
supersaiyanx said:
32GB micro SD class 10, the best!
Click to expand...
Click to collapse
Not all micro SD class 10 have the same speed my friend.
class 10 card means that meets the minimum requirements of class 10 of SD Card Association protype, which is 10 MB/second
in fact some quality class 6 cards may give you speed more than 10 MB/s, while cheap - low quality class 10 will give you just 10 MB/s or even worse theoretically 10MB/s under perfect weather ect condintions.....
par example samsung sd class 10 plus gives you up to these
• Speed Rating Speed (read) : 24MB/s
• Speed (write) : 21MB/s
which i think worth the few extra usd.
same brand's class 6 cards give you
Speed (Read) 17MB / sec.
Speed (Write) 12 ~ 13MB / sec.
which is much faster than low quality class 10
So you should rethink about class 10 now

Yeah i agree.
My Class 6 Sandisk transfers at 10MB/s beating my Class 6 32GB Gskill transferring at 6 MB/s max.
Sent from my GT-I8160 using Tapatalk 2

HD2 Memory 32G $99 CLASS 4!

Kingston 32GB Micro SDHC Flash Card with MicroSD Reader Gen 2 Model MRG2+SDC4/32GB
Average Rating 5 out of 5 eggs5/5(1 reviews)
In stock.
Now: $99.99
*
Free Shipping (restrictions apply)
Additional fees may apply to shipments to AK, HI and PR.
At New Egg!

This is worth it, take it from someone who was looking for something other than SanDisk 32GB C2 I have been waiting for Kingston's 32GB C4 for long time and when it came out I got it though offical site for $159.

Yeah, I ordered one of these last week from newegg along with an otterbox defender case for $33 w/free shipping for both.... not too bad at all. Should be getting them today. Has anyone used the Kingston class 4 32gb card for running android on the hd2?
Sent from my HTC HD2 using XDA App

Well, far as I know people do claim the R/W IOPs for HD2 when card inside the device won't go beyond class 2 rate but some who did use class 4-6 cards said they did see major improvement in terms of loading OS/Apps from mSD card. Anything beyond class 4 is an overkill on HD2 that I accept unless you are moving around massive amount of data and use HD2 as your mean to transfer it, in that case just buy thumb drive.
"Sent from my PC using THE hand" lol

I was in a Fry's Electronics the other day and I saw a 16gb Class 10 microsd card for $32.00. Don't remember the maker but it was not name brand, that is extremely questionable

wow
my videos which are about 12g play almost instantly now i love this card and the free usb reader, thanks kingston

Ya this card was worth waiting for hell I shot up an storm in this section comparing other vendors. Now I have the SanDisk 16GB C2 card not sure what to do with it, hopefully I can sell that cheap.

same
stuck with the sandisk

I ordered this 32GB class 4 card from Kingston and it is much slower then my old SanDisk card. Booting Android took over 5 minutes and after that the device still is VERY slow.
With its card reader I could copy my files onto it with 3-4MB/s.
Then I installed SKTools under Windows Mobile and used its benchmark tool to compare my SD Cards:
My old SanDisk 8GB card (stock one from the blackstone, afaik class 2): ~6,6MB/s reading and 1,1-1,5MB/s writing
The new class 4 32GB Kingston card: ~2,2MB/s reading and 500-700KB/s writing
So I can't use Android with this crappy SD card.

Ya IDK man same on my end. Took me 25min to traf 320mb files, ATM showing me 116min to traf 4.1gb.

i got kingston 23gb class 4. really disappointed takes forever to transfer. but speed test shows its class 4.
http://forum.xda-developers.com/showthread.php?t=861232
oh yeah i got the one from frys it rocks to bad its not 32gb.

I would stick with SanDisk.
I wanned to try out a faster card so got a class 6 Kingston 8gb.. while it loaded things faster, it caused severe stuttering and lagginess at times.
Upon reserach i found, kingston, and many other cards are not the same quality grade as sandisk, i am told in order to be price competitive they buy crap from others at cheap and stick thier name in it. And sometimes they buy rejects from sandisk, toshiba, samsung etc and brand them.....
Unfortunately i cant remmeber the links i researched....
So i would stick with sandisk, or another proven manufacturer....

UThis is total BS, I started it at like 6PM and now its 10:40PM and still 78min's to go WTF and its just 4.2GB music files avg at like 3-6mb/ea. Now I remember putting the whole dir in SanDisk 16GB Class 2 in less than 40min. So WTF does it take so long? Also as I wrote to Kingston CS ill share it here.
To make the file transfer go faster you have to directly allocate the file in memory thus saving time for R/W IO access. I did test many times but I am not even sure HD2 is following SD 2.0 or is it just this POS card no were close to even the stock SanDisk's.
Test: Dir with 5 files at 5mb/ea so thats 25mb. If you copy each file you reduce the time by 3x but if you copy the dir all the objects inside takes time to allocate for some reason.
PS: I am thinking about now getting SanDisk 32GB Class 2.
***UPDATE***
3.85GB
Write
--------
SanDisk 16GB Class 2 = 26min
Kingston 32GB Class 4 = 191min

HyperNode said:
Ya IDK man same on my end. Took me 25min to traf 320mb files, ATM showing me 116min to traf 4.1gb.
Click to expand...
Click to collapse
I also don't understand this.. I have a 16gb C2 card and wanted to experiment a lot with the various android roms out there, so thought a C4 would be the answer. ordered a 16gb C4 and it is always slower than the C2. a full 30 seconds on booting Android.
This confuses me.....okay okay .. thats not hard to do, but as far as I'm concerned if a card is rated at twice the "constant" speed of the other .. it should be faster...
<fx: scratches head and moves on>

HyperNode said:
Well, far as I know people do claim the R/W IOPs for HD2 when card inside the device won't go beyond class 2 rate but some who did use class 4-6 cards said they did see major improvement in terms of loading OS/Apps from mSD card. Anything beyond class 4 is an overkill on HD2 that I accept unless you are moving around massive amount of data and use HD2 as your mean to transfer it, in that case just buy thumb drive.
"Sent from my PC using THE hand" lol
Click to expand...
Click to collapse
I think it really depends on the card and not the class. I have a couple of Class4 and Class6 cards with identical builds of android and my class2 16gb continually outperform them in boot times and general speed. Class only designates write speed and there is a lot more to an SD card's performance that is not captured in the class designation.

ATM I am thinking about returning the Kingston 32GB C4 as I spoke to Kingston Tech Support and might go with SanDisk 32GB C2. Alot of people say SanDisk is superior and is faster for some reason and getting close to class 4 rating.

HyperNode said:
ATM I am thinking about returning the Kingston 32GB C4 as I spoke to Kingston Tech Support and might go with SanDisk 32GB C2. Alot of people say SanDisk is superior and is faster for some reason and getting close to class 4 rating.
Click to expand...
Click to collapse
I can only quote my experience and that is that kingston C4 is NOT fast at all.
Good luck to you.. and if you find the San Disk C4 is sooo much faster than the C2 can you report back please .. ?? So I can go get one

I just bought a kingston 32gb class 6 micro sdhc but when ever i put it in my hd2 it just freezes up and as soon as I remove the card it works fine again.At first i thought that it was a fake so I:
1)performed multiple tests,
2)reformated a 1000 times,
3)even putting 20gb of data just to make sure.
Turns out that it is authentic and it works perfectly on my girlfriend's htc BalckStone it also worked when I installed NAND (which i later removed due to insufficient memory).Ive been searching for days, I think its a windows mobile issue, any tips??

gothikserpent said:
I just bought a kingston 32gb class 6 micro sdhc but when ever i put it in my hd2 it just freezes up and as soon as I remove the card it works fine again.At first i thought that it was a fake so I:
1)performed multiple tests,
2)reformated a 1000 times,
3)even putting 20gb of data just to make sure.
Turns out that it is authentic and it works perfectly on my girlfriend's htc BalckStone it also worked when I installed NAND (which i later removed due to insufficient memory).Ive been searching for days, I think its a windows mobile issue, any tips??
Click to expand...
Click to collapse
LOL you are way to funny man as you said "I just bought a kingston 32gb class 6 micro sdhc" and then on top of that "Turns out that it is authentic".
I am guessing you got this card from eBay? If thats the case then its fake ill tell you why as there is no Kingston 32GB Class 6 card ATM. My best bet is you do extended data testing on it and verify the content to make sure its not corrupted. But if I was you I wouldn't do any of this as ill return that POS, why take chance with your data? Also NEVER buy memory cards via eBay or else you will be pwned with notorious chinese fakes.
But for those who actually thinking about buying the legit Kingston 32GB Class 4 microSD read below and think twice.
STHNS said:
Here this might be helpful to you.
Code:
df /dev/mnt/sdcard
File system: FAT32 (0x0c)
Used space: 16.0 KB (16,384 bytes)
Free space: 29.8 GB (32,073,891,840 bytes)
The data below is the actual IOPs from System (USB: Standard-A) to Device (USB: Micro-B) via USB (USB 2.0/SD 2.0). I am not using any type of card reader for this test as we only want the actual data rate of the card itself natively while its mounted in the device.
Subject: Kingston 32GB Class 4 (4MB/s) microSDHC.
Sequential Test Data (Block Size = 1024KB|0 Fill = 0x00)
Read [MB/s]: 13.07+11.72+13.11=37.9/3=12.63
Write [MB/s]: 4.080+3.339+1.592=9.011/3=3.00
Sequential Test Data (Block Size = 1024KB|1 Fill = 0xFF)
Read [MB/s]: 13.07+13.10+11.61=37.78/3=12.59
Write [MB/s]: 3.659+2.618+3.607=9.884/3=3.30
Mode: Low level R+W+V initialization
Data volume: 30588MBytes
Patterns: 18 sets, 8 of "walking one", 8 of "walking zero", 55h, AAh
Writing speed [03:24:28]: 2.49 MByte/s
Reading speed [00:44:20]: 11.5 MByte/s
Burst write: 4.0+4.0+4.0=4.0 MB/s
Burst read: 10.0+9.0+9.0=9.33 MB/s
Click to expand...
Click to collapse

It's class 4 but it's very expensive.. too much money for just a SD card

[Q] About SD Card

Hello
I got my Legend about 2 months ago, and I have a big problem with storage space...
What is the biggest sized SD card the Legend can use?
What is the type of SD card (micro, mini, etc...)
What is SD card class?
Thank you very much

microSD compliant with SD2.0 Standard (aka microSDHC)
The biggest size available currently is 32GB.
I don't know if even more is possible with microSDHC or if bigger cards will only be possible with SD3.0 (aka SDXC) but that question is not relevant as you can't buy any greater then 32GB yet.
The Class of the SDCard is a measurement for guaranteed minimum speed in random read/write.
The Class does not provide any information about real-world speed or max speed.
For your mobile phone the class is a pretty useless criterion as you don't need any guaranteed minimum speeds but good overall speeds ESPECIALLY sequential.
The guaranteed minimum speed is important for HD Video Cameras for example where you write data all the time at a given speed (resolution).

thanks.
but I DO need class with high speed because I want to use Data2Ext...

Don't pick uSD card based on class !! class tels you MB/s for sequential write only... you need a card that is overall fast, I had 16GB class 10 Kingston and data2ext was just horrible!
Now I'm with class 4 Sandisk mobile ultra and it is in fact faster in every test I ran...
So read reviews before you buy

ye but that is exactly why im asking...

well then, I recommend sandisk mobile ultra as I have it and it is OK, there are probably faster cards...just see the small files read / write speeds in reviews those are of greatest importance

i purchased a kingston 8GB class 4 which crapped out. android kept reported sdcard unexpectedly removed. tried all sorts (formatting in windows, android, quick, long, etc).
RMA replacement did exactly the same, so i'm guessing kingston class 4's are best avoided.

If I recall correctly I have a 16GB microSDHC Class 4 card. After applying data2ext with this card, my Quadrant scores hit around 1500, which is crazy.
This is where I found my card: http://www.amazon.co.uk/SanDisk-16G...P06K/ref=sr_1_1?ie=UTF8&qid=1298984123&sr=8-1
I personally recommend this card.

witch is better class 4 or class 6?

r69001 said:
Hello
I got my Legend about 2 months ago, and I have a big problem with storage space...
What is the biggest sized SD card the Legend can use?
What is the type of SD card (micro, mini, etc...)
What is SD card class?
Thank you very much
Click to expand...
Click to collapse
Did you by any chance go to HTC's website to read about the phone? It has the full specs listed..
Sent from my Legend using XDA App

dangal said:
witch is better class 4 or class 6?
Click to expand...
Click to collapse
class 6 is better , but class 10 is even better

I've got a Sandisk Ultra Mobile 16gb SDHC which works fine in the Legend. Make sure you format it with the phone to stop it being dismounted, well known issue and the fix

Micro SD Class 2 or 4?

I had a Galaxy Ace wich I upgraded to my new Optimus Black. I bought a 8 GB Class 2 micro SD, OB came with 4 GB Class 4 micro SD. Would i feel the difference between both of 'em if i user 8gb class 2 again? I think i need more data storage

Not using a2sd or anything like that.

higher class = higher write/read speed
plus,if you like customize your rom, it's better if you have a >=6 class sd card

class 10 please , i have samsung 8gb class 10 and it`s not a big difference in price between 6 and 10

i got a 16GB class 10 from amazon for about 20€
Samsung MicroSD
Samsung MicroSD #2

agent205 said:
higher class = higher write/read speed
Click to expand...
Click to collapse
No. Higher class = higher minimum write/read speed.

You can try get a legendary Class 10 Micro SD with more than 8GB
Belive me, it will be your best upgrade purchase for the OB
Actually I have a Micro SD Adata Class 10 16GB. On my daily usage, I noticed better performance from games that requiere SD data storage and better speed for tranfer files via usb. On my experience, 1GB in 1:30min!!! Well that's when i'm transfer a unique .rar file, if you try with a folder of same size it takes a little more time
Another thing, if you're a gamer, trust me... you must get a 16Gb micro SD at least, because the heavy graphics games (like newest Gameloft Games) have very heavy quantity of data. Only with the downloadable data of Nova2, Asphalth 6, MC3, Street Fighter IV, FIFA12 and Real Racing2 you fill a MicroSD 8GB!!! D: but they are very good games ;D
Well, I hope this info will help you and if I was on your shoes... I hurt you!!! XD jajaja just kindding but seriously think about grab a better SD class with more than 8Gb ok... well you have the better choice. Regards from Mexico
PD. Sorry about my bad English T-T

defintely use higher class (min. class 6)... you will gain a benefit when loading/copying large amount of data. agree with above.

Class - Speed
2 - 2 MB/s
4 - 4 MB/s
6 - 6 MB/s
10- 10 MB/s

SourDieselTHC said:
Class - Speed
2 - 2 MB/s
4 - 4 MB/s
6 - 6 MB/s
10- 10 MB/s
Click to expand...
Click to collapse
Those are the minimum speeds, the class doesn't say anything about maximum speeds. It is possible for a lower class card to reach higher speeds than a higher class card. It should not be possible for a card of a given class to go slower than the class minimum.

I had the common lag in camera recording...when I changed to samsung 32GB class 10 all went fine , that was still in froyo. I got it for only 27€ in an spanish online shop called "pccomponentes".
Great deal..3 months so far and all running well.

The Classes are the speed to write on SD, If You have a class 4 is better than 2, but maybe is more expensive.

sarremiro said:
I had a Galaxy Ace wich I upgraded to my new Optimus Black. I bought a 8 GB Class 2 micro SD, OB came with 4 GB Class 4 micro SD. Would i feel the difference between both of 'em if i user 8gb class 2 again? I think i need more data storage
Click to expand...
Click to collapse
It's a good dilema, space vs speed. As others have said if you are a gamer go for speed. If you just have music a pictures on your SD and are patient then go for size.

I got a 8GB with 10class and my phone "fly".
kingmax - price 10€

Yeah, I suggest too to choose a class 10 if you are a gamer, a lower class if you're not.
But I don't suggest you to use a SD wich is less than class 4. Class 4 for in my opinion is the lower class to consider, others are too slow even for photos. Your device may suffer of this (be very slow)