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microSD 32Gb class 6 and Galaxy S

I am thinking about purchasing a 32Gb microSD for use with my galaxy S.
My concern is that, is this too large? Are there any bad side effect like it being too slow to display picture/start up scann/run applications?

Which brand? That's probably more important for the speed than class (a class 2 Sandisk is often as fast or faster than a class 6 from a lesser brand).
The capacity of the card shouldn't affect the speed during most situations. However the phone does scan for media each time it is turned on or after disconnecting from USB connection (Kies or mass storage), the amount of time this takes depends on:
-the amount of media stored on the card and
-(probably) the read speed of the card.
Note that class rating is minimum write speed - so it's not a great indicator of real-life performance.
Also note that some too-cheap-to-be-true cards are actually smaller capacity cards that report larger capacities to fool the customer.
BTW where are you getting the card from (I want one as well ).

Hi flamingpitofhell,
I am looking at Sandisk as well and most likely get it from their online store. I am trying to find more information whether it is worth the trouble.

I don't think Sandisk sell class 6 cards (yet). Buying from their online store's also more expensive than online retailers (I can get one in Australia for AUD155, which is ~USD137, cf their RRP of USD200).

thanks for the pointer. will look around for local stores here in Thailand.
Which city in Australia are you in? I studied in Perth more than a decaded back.

I'm in glorious Melbourne mate, haven't been to Perth yet

the only LEGIT 32GB Sandisk available right now in the market is only Class 2
if you read anything else, it is FAKE, specially from eBay
wait until the other microSD manufactures start pushing out 32GB on class 4 or class 6 before buying.
i'm using 2x 16GB Class 6 until the 32GB class 6 becomes available.

I'm using Class 2 32GB card in mine, its fine.
Its slower when you're transferring to the card from your PC, but for most people thats only particularly problematic the first time (loading music collection), after that you'll not really notice a difference in the phone (the read speeds are basically the same, and the phone can neither read nor write to the card faster than a Class 2 card can cope with). You can see it in the benchmarks taken post-mimocans fix - Class 2 cards are no slower than any other Class within the phone.
Grab one now and be happy.

NZtechfreak said:
I'm using Class 2 32GB card in mine, its fine.
Grab one now and be happy.
Click to expand...
Click to collapse
Where did you get yours from and how much for. I`m interested in getting one myself.
Thanks

my local stores already carry the real Sandisk 32GB class 2
too slow for my taste, i like to run Apps from the SD card, also use it as a SWAP partidion to prevent the LAG problem people complains about, it's a very easy fix
http://forum.xda-developers.com/showthread.php?t=724251

i wonder what would be better a 16gb class 6 or 32gb class 2...
is it worth sacrifising double of the memory for the speed?

onbacardi said:
i wonder what would be better a 16gb class 6 or 32gb class 2...
is it worth sacrifising double of the memory for the speed?
Click to expand...
Click to collapse
it depends what you are trying to do
if it's just to listen to mp3, then Class 2 is fine
if you want to run games, software, watch movies, use it for SWAP drive to have no lag, then minimum a Class 6

Class ratings don't really seem to have too much of an effect on real world performance: http://forums.whirlpool.net.au/forum-replies.cfm?t=1468705. Just discount the last result from the SGS (it's most likely mistaken for the internal SD).

i rather trust my experience coming from PalmOS + WinMb where real life situations using a class 4 or slower cards, made a huge word of difference when launching applications from SD and watching movies from SD
funny enough the numbers reported on that topic shows SGS i9000 to have the fastest speed even using the same card that got lower speed on the other phones.
which seems to point out it's directly proportional to the CPU speed, and the multitasking software running in the back end.
however as you see on those test itself, there are speed differences between class 2, class 4 and class 6
the same class # can not be compared to another class # of a different size,
if you imagine a hard drive, the bigger the hard drive the more layers/disk area it has to read, the same is true even for static SD cards.
however as pointed on those test Transcend usually has the fastest SD cards in the market, that's why i always buy that brand for performance, using a 16GB Transcend myself, waiting for the 32 GB class 6+ to come out
Adata has 2 lines, the performance line, and the standard line
if you want speed get the performance SD cards
Kingston and Sandisk are mostly standard speed, they don't release much performance level SD cards anymore, but they do have lots of those on USB sticks.

I tried my Brothers Sandisk Class 2 32GB and it worked perfectly.
Granted it's not as fast as my Sandisk Mobile Ultra Class 4 but that card flies anyway.
Certainly for recording your large movie files taken with the camera it's no different in speed than using the built in SDCard on the phone.

I have no problems watching 720P video on my phone. I have no problems launching applications either.
So much misinformation...

of course there is no problem, the issue here is getting the top performance, any SD card will work just fine.
it's just a matter of how fast/slow are you able to torelate

The only time you will notice any difference in speed is when transferring data to and from the card.
However, when you have double the space of other cards to consider speed should not be a deciding factor.
I'm already looking to get the Sandisk Class 2 32GB card. It will store all of my work files normally kept on my Laptop.
My Sandisk Class 4 Mobile Ultra 16GB will be my spare ~ should the larger card fail...

Thanks for the information s everyone.
Sent from my GT-I9000 using XDA App

I have the 32GB sandisk card and works perfect. I have a 720p mkv file and my music on there. Playback was superb for the video with no noticeable lag. Mind you the card isn't anywhere near full yet. From my limited knowledge of sd cards, they put data on the fastest part first so the fuller it gets the slower the card is likely to get..
My plan is to put movies and songs on the 32GB file and reserve the internal 13GB for capturing video and taking pictures on the phone.

32gb micro sd fast enough?

will the 32gb mirco sd class 2 be fast enough to run apps off the sd card without problems?? or should i sacrifice size with speed and get a 16gb class 4 or 6?

yes its plenty for this handset. many many many people already have theses cards in the droid and the evo and all have had much success with it.

Works fine for me.
Sent From My HTC Evo 4G Using Tapa Talk Pro!

I use a class 10, to reduce the current draw. If I were to run it a maximum speed it would be limited by the heat it would generate. So in affect it would be limited by the current it consumes. Not talking about leaks, but overall. Slower sd's are also limited the same way but consume their limit at slower speeds. Since the faster cards are limited (maxed) at higher speeds they consume less at slower speeds, because they are rated at uamps/read/write.

Engadget posted about a class 4 just the other day, due to my post count I can't link. But kingston does have one, even though it's much more expensive. If you're running out of room I would suggest only keeping vital media files with you, and using subsonic to stream anything else.

i wanted the extra space so i can use the phone as an ipod since my zune crashed

Class two is damn slow, I did in fact notice a good speed jump with my class 6
Sent from my EVO

You guys know where I Could Find a good 32gb or 16gb SD Card at a cheap price.. ??

ins0dus said:
You guys know where I Could Find a good 32gb or 16gb SD Card at a cheap price.. ??
Click to expand...
Click to collapse
Got my 16gb on eBay for around 28! It is probably class 2 but I don't care lol

I bought one of THESE class 6, 16gb microSD cards, and it seems to be pretty good. No problems so far.

I'm using a class 2 to run apps off of and its plenty fast (also cause im to cheap to buy anything better lol)

Yeah class 2 should be totally fine
Sent from my HTC EVO 4G

tkirton recommends at least a class 4 for Dark Tremor. My G1 would crash on anything less than a class 6 when running apps2sd but that phone is a bit inferior to this one. Not sure if Google has a recommendation for Froyo a2sd.
Sent from my SUPERSONIC

I picked this one up a week ago and its working perfect.
CENTON 16GB CLASS 6
http://www.newegg.com/Product/Produ...37189&cm_re=16_gb_sdhc-_-20-237-189-_-Product

I got kingston 32Gb micro sd card for less then 40 on ebay from us seller it is class 4. It reads at 9mbs and it write speed is at 4 mbs.
http://www.engadget.com/2010/02/24/the-surprisingly-seedy-side-of-microsd-production/

SD read/write speed causing lag on my HD2 but...

So I downloaded this app call H2testw.exe to test for legit sdcards but it also tells the read/write speed as well. I am testing my 8gb and 1gb cards. I set it to write a 300 mb files to the card and verify it.
Info about Android running on the two cards:
8gb = lags coming out of sleep, touch screen freezes, write~7.5 mb/s, read~12mb/s
1gb = no lags, no touch screen, write~4.3mb, read~13mb/s
I'm confused. The read speed is almost the same yet the 1gb microsd is more responsive running MDJ android compared to the 8gb microsd. Any thought?
UPDATE: Maybe this is what's causing the problem. Stolen from Engadget.
What we've learned from our tipsters and from documents culled from Microsoft, Samsung, and others is that the big issue is random access performance -- a figure that isn't taken into account in a card's class rating. Ironically, Microsoft discovered in its testing that cards with higher class ratings actually performed worse on Windows Phone 7 because the tweaks card manufacturers make to achieve high sequential throughput can actually hurt random access times. There's some rocket science involved here, but basically, it's a tradeoff and a bit of a gamble -- if a manufacturer tunes a card for a high class rating, it takes more time to access the first byte at a new location on the card because it's optimizing access for that area of memory, but once it does that, it can blast sequential bytes at very high speed. If you've got a lot of small reads or writes you need to make to different files at different locations in the card's memory, though, you really start to suffer. Cards with lower class ratings tend to spend less time optimizing sequential access prior to the first read / write operation, so it can move around the card (that is, access it randomly) much faster.
Click to expand...
Click to collapse
Source:
http://www.engadget.com/2010/11/17/windows-phone-7s-microsd-mess-the-full-story-and-how-nokia-ca/

They are probably different classes, plus it naturally takes longer with a bigger card because there's more files and more space to read and write
Sent from my HD2 Nexus One using XDA App

I get screen freezes with 8gb and up but rarely with new builds, haven't tried a card higher than class 6
Also I'm on radio 2.15
Sent from my HD2 Nexus One using XDA App

Oddly enough, I have two 8gb cards, one class 4 the other class 6, and they hiccup more than my 16gb class 2.
Now that is weird.

I'm lost myself...I'm thinking off just getting me a 4gb card and hope for the best...

I heard the 16gb class 10 is perfect but it still cost to much for nand to be around the corner
Sent from my HD2 Nexus One using XDA App

16 gb class 10 no lag cost me over 100 pounds tho
Sent from my HTC Desire using XDA App

Cheapest 16GB - lags from time to time :/
Maybe defragmentation may help?

tomus said:
Cheapest 16GB - lags from time to time :/
Maybe defragmentation may help?
Click to expand...
Click to collapse
Defrag wont help...scan for errors...try to have only the android folder and see if it makes a different ..

Btw, guys...
all sd cards are not created equal. all sd cards of the same CLASS are not created equal.
Check out the ongoing drama with win7 phones with SD slots....
class measures throughput, what affects the SOD and related issues is random access speed, not throughput so much.

It's just my 2 cents, but I've tested Class 2, 4, and 6 MicroSDHC cards and found very little noticeable difference once Android is fully booted up and running on the HD2. Moreover, none of the cards create screen freezes or SOD issues or high battery drain problems here. That said, I have noticed that the actual boot time and file transfer speed (from the PC to the card) can be faster on average with quality higher class rated cards of the same size. Also, I've found that the larger the card size, the longer the android boot time, no matter the class. Guess that makes sense, as the system need to read more sectors with larger size cards. Please note that I've only tested Sandisk, Toshiba, TopRam and Samsung cards to date. What's kind of strange is that the Class 2 16 & 32GB Sandisk cards run just as well or slightly better for some reason than some of my higher class rated cards. Go figure...
As far as issues go, I recommend only using quality brand name cards, no ebay fakes or cheap no name brands. Also, I've had great luck formatting all my cards with SD Formatter v2.0 and v3.0, using the quick format mode with the standard 32kb cluster size.
Best to all,
R

rhacy said:
It's just my 2 cents, but I've tested Class 2, 4, and 6 MicroSDHC cards and found very little noticeable difference once Android is fully booted up and running on the HD2. Moreover, none of the cards create screen freezes or SOD issues or high battery drain problems here. That said, I have noticed that the actual boot time and file transfer speed (from the PC to the card) can be faster on average with quality higher class rated cards of the same size. Also, I've found that the larger the card size, the longer the android boot time, no matter the class. Guess that makes sense, as the system need to read more sectors with larger size cards. Please note that I've only tested Sandisk, Toshiba, TopRam and Samsung cards to date. What's kind of strange is that the Class 2 16 & 32GB Sandisk cards run just as well or slightly better for some reason than some of my higher class rated cards. Go figure...
As far as issues go, I recommend only using quality brand name cards, no ebay fakes or cheap no name brands. Also, I've had great luck formatting all my cards with SD Formatter v2.0 and v3.0, using the quick format mode with the standard 32kb cluster size.
Best to all,
R
Click to expand...
Click to collapse
Great info here. I think I will just order me a new card from a reputable brand. Maybe my card is just getting old. Maybe a 16gb from Amazon will do. They aren't too expensive nowaday. ~$26.

Does the Radio version effects the lag of the sd card? Or the kernel?

distruct said:
Does the Radio version effects the lag of the sd card? Or the kernel?
Click to expand...
Click to collapse
No, not on the sd but radio does effect how the build will run, your phone calls, your battery.

Could this be the reason why class don't matter on hd2 android? I mean even some class 4 & 6 have lag and sod problem. I pulled this bit from engadget. It's an article on wp7 and memory card issues.
What we've learned from our tipsters and from documents culled from Microsoft, Samsung, and others is that the big issue is random access performance -- a figure that isn't taken into account in a card's class rating. Ironically, Microsoft discovered in its testing that cards with higher class ratings actually performed worse on Windows Phone 7 because the tweaks card manufacturers make to achieve high sequential throughput can actually hurt random access times. There's some rocket science involved here, but basically, it's a tradeoff and a bit of a gamble -- if a manufacturer tunes a card for a high class rating, it takes more time to access the first byte at a new location on the card because it's optimizing access for that area of memory, but once it does that, it can blast sequential bytes at very high speed. If you've got a lot of small reads or writes you need to make to different files at different locations in the card's memory, though, you really start to suffer. Cards with lower class ratings tend to spend less time optimizing sequential access prior to the first read / write operation, so it can move around the card (that is, access it randomly) much faster.
Click to expand...
Click to collapse
Source:
http://www.engadget.com/2010/11/17/windows-phone-7s-microsd-mess-the-full-story-and-how-nokia-ca/

azzzz said:
Could this be the reason why class don't matter on hd2 android? I mean even some class 4 & 6 have lag and sod problem. I pulled this bit from engadget. It's an article on wp7 and memory card issues.
Source:
http://www.engadget.com/2010/11/17/windows-phone-7s-microsd-mess-the-full-story-and-how-nokia-ca/
Click to expand...
Click to collapse
Obviously.
Been saying this for a while, myself - I have experimented, and I get SOD every time with my 16gb class 6 card, but rarely with my class 2 8gb, and never ever (and, tbh, better responsiveness overall) with my 2gb NON-HC card

enneract said:
Obviously.
Been saying this for a while, myself - I have experimented, and I get SOD every time with my 16gb class 6 card, but rarely with my class 2 8gb, and never ever (and, tbh, better responsiveness overall) with my 2gb NON-HC card
Click to expand...
Click to collapse
I hope so...my class 2 16gb will be here in a couple of days...i hope it's faster than my current 8gb class 4....
Update: my 16gb class 2 sandisk is here. Things have improved alot. Wake up is faster now with less lag, market download speed is faster now (10kb vs 100kb). Hopefully system performance will be better...

[Q] SD Card Class Question

Ok.... So I have a 32gb Class 4 SD Card. When I went from the stock 16 class 6 card I noticed a speed difference... And well.. It has finally got to me... I am looking at going class 10 but I am wondering if anyone has done an upgrade like this and has any input.
I understand the class number is directly related to the speed in mbps but I guess what I am really curious about is will the epic write/read the card at faster speeds (than 6 [which is stock]) reducing my lag spikes in applications, pictures (taking and viewing), and in gallery 3d(While creating thumbnails [I have noticed this has slowed down the MOST])
For anyone who is interested I am looking at getting this SD card (Please note that I have nothing to do with this seller on amazon and am purely asking for opinions)...
amazon /Patriot-Signature-MicroSDHC-Memory-PSF32GMCSDHC10/dp/B004H8FTCU <----- Insert .com
Again I do know the pure fact that a class 10 offers more speed than class 6 and 4 but is the epic capable of using that speed?
Thanks in advance!

I don't know if our hardware will push the speeds of a class 10, that's not saying you cant use it, just saying you likely won't get those speeds out of it. Most of the time you can't get that much out of one even if the hardware will support it. I'd be willing to be 60% of cards out there are over classed or numbers are inflated from actual production chips.

"Stock card" was a Class 6? My launch day Epic came with a Class 2...

crzyrider250 said:
"Stock card" was a Class 6? My launch day Epic came with a Class 2...
Click to expand...
Click to collapse
My 3 month old Epic also came with a Class 2. LOL - popping it out with the phone running caused my Phone to reboot (Bonsai).

Kcarpenter said:
I don't know if our hardware will push the speeds of a class 10, that's not saying you cant use it, just saying you likely won't get those speeds out of it. Most of the time you can't get that much out of one even if the hardware will support it. I'd be willing to be 60% of cards out there are over classed or numbers are inflated from actual production chips.
Click to expand...
Click to collapse
Yes. Our hardware can. I have done tests transferring files from my computer to the USB card via my phone and it is extremely fast. Camra speed has also dramatically increased if you are taking HD photos. Camcorder speed also increased. But I was going from a stock class 2 16gb that came with the phone to a class 10... So coming from a Class 6, I dunno how much of an increase that would be.

is this normal for a class 4 sd card?

i bought an 8gb sandisk micro sd card quite a few years back before my first smartphone. didnt know it was a class 4. didnt know about that back then.(finally looked at the card itself just yesterday lol)
anyways, ive had it in my wifes hero and i was using the stock evo one, found out about sd tools and did some tests. stock evo sd was doing about 5MB/s write and about 10MB/s read. i noticed on hers she was getting about 7MB/s write and about 10-12MB/s read. kicked myself in the butt for accidently letting her have the faster one(she doesnt care)
well i swapped em. 12.8MB/s(avg 10-11MB/s) write and 20+MB/s read
i always thought 1 MB/s per class number

Is this test accurate? Did same test on a class 10 card and got the same results. Is the EVO able to transfer information at that rate to the sd card to achieve the above test results?

the class.. is to mark batches made a certain speed... but to the lowest possible deviation.
i am sure that in the same batch.. there are some that are not as fast.. and some are faster. you got lucky with this one.
also maybe.. sometimes manufactures just make a huge production line of product... but mark some a lower speeds... cost is the same for the manufacturer.
mark some class 4, some class 6.
in the past.. Intel has done this with a few CPUs....