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Memory cards

Just a quick question about memory cards. I have read on this forum that it is possible to run a 16gb class 6 high capacity secure digital card in a HTC Universal running a Windowmobile 6 Rom 2.09.01_BL__B_V1; can the same also be said for a 16gb class 4 high capacity secure digital card? I have found one on the net that I am thinking of buying but thought to ask before doing so. The item is http://www.amazon.co.uk/Integral-16Gb-SDHC-Class-Card/dp/B000ZOVB0Y/ref=pd_sbs_ce_title_9
I have a contract with O2 and have been informed I am due an upgrade, I have had a look at the O2 Orbit 2, nice looking device; what are the other names for this device as I am unsure?
Thanks for viewing and replies welcome.

Yes ,it support my Toshiba 8gb class4 very well!

the "class" on SDHC cards only marks their speed.
it's the "guaranteed minimum consecutive write speed" in MByte/s
So a class 6 card must be able to handle 6MB/s write speed. It may be a lot faster, but if it's slower you can return it as defective.
The only difference between a class 2 and a class 6 card is that one uses better memory chips than the other, so it can receive/transmit data faster. The interface / layout / pinout / logic / data structure is all the same.
It's like 12x and 52x CD-R. You can use both in any drive that supports either, just the one gets the job done a little faster than the other.
Of course that the card can handle 30MB/s doesn't neccessarily mean your universal can, but it should work (at the universals maximum speed) nontheless.
I'm using a sandisc 16GB SHDC class 6 card at the moment with a Crossbow rom, runs very well.

MicroSD for Froyo - general consensus?

Hello,
Now that Froyo more or less came out and apps will start having Apps2SD function, it's time for a MicroSD upgrade.
What I want is on-phone performance - that running heavy 3D games on SD would perform as smoothly as if it was on internal memory. Is there a general consensus on what brand/class would suffice, and what is overkill? I have no concern over data cable transfer speed, as I'm pretty sure the phone will limit the speed much before the SD card does.
I'm looking at this Sandisk 16gb MicroSDHC Class 2 for $35 after shipping:
http://www.amazon.com/SanDisk-Flash...ref=sr_1_1?ie=UTF8&s=pc&qid=1275145563&sr=1-1
Anyone know if this would suffice?
Past threads have always went on tangents about good brand vs knock offs, how class is important vs. a marketing ploy, etc etc. Has a general consensus been reached in the xda community over what is sufficient but not overkill for onboard performance? Perhaps people who have already ran App2SD and use games and videos a lot have some input.
Thanks

I have a Top Ram 16 Gig class 6 and I think I paid about the same as you looking to pay for a class2. I also have a class2 that I have had for over a year. I used to use it in my blackberry. It still works and it is made by one of the cheap manufacturers.

Argh, I'm suffering from chronic SD corruption. So I'm in the market for a new chip. Think I'll spring for a 32gb this time. What's the latest on one that's both compatible and fast? And cheap too, that would be nice, links appreciated.

Considering that due to the amount of RAM the N1 has your main apps will be loaded already so card speed is not a significant factor, unless you use lots of different apps on a regular basis.
A faster card is beneficial mostly for the time i takes when I am loading up new music and possibly vids if you use it for that

This is the first 32gb MicroSD card I have seen "In Stock" Pretty expensive for a class 2 though.
http://www.buy.com/prod/sandisk-sds...crosdhc-32-gb-retail/q/loc/101/215191110.html

!!
Im not sure the nexus 1 can handle a 32GB card , wow that's a lot lol, but you can get one for like $30 on ebay... http://bit.ly/9J7u2S

You can get a 16gb class 10 for about $90.00.
http://www.amazon.com/dp/B0036V5DGG...e=asn&creative=380341&creativeASIN=B0036V5DGG

frankzua77 said:
Im not sure the nexus 1 can handle a 32GB card , wow that's a lot lol, but you can get one for like $30 on ebay... http://bit.ly/9J7u2S
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Micro SDHC is a standard that supports up to 32gb. Of course it can handle it just fine.
I run a 16gb Class 6 in mine, works fine

bewar ebay, there a lot of folks selling fake cards. They even read as what they were sold as but then fill up mighty quick............
The class is not needed I don't think
I have a class six and have been running games on it from sd for 3 months cant tell a bit of difference. I run linpack from sd and it works fine too!

the only real 32gb card is found here., http://www.sandisk.com/products/mobile-memory-products/sandisk-microsdhc

frankzua77 said:
Im not sure the nexus 1 can handle a 32GB card , wow that's a lot lol, but you can get one for like $30 on ebay... http://bit.ly/9J7u2S
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no f-ing way that is real for $30

GldRush98 said:
Micro SDHC is a standard that supports up to 32gb. Of course it can handle it just fine.
I run a 16gb Class 6 in mine, works fine
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I'm running a 32gb Sandisk Class 2 in my Nexus as of last Friday. No problems (apart from a looooong time to refresh the media library after resyncing my music).

You can not get a genuine 32GB Micro SD card for US$40.
A good class 2 card (2MB/s) will offer you the same performance as any other class in your phone.
The limitation is not the speed of the card.
Buy a brand name card with the capacity you require and be done with the complexity.

djmcnz said:
You can not get a genuine 32GB Micro SD card for US$40.
A good class 2 card (2MB/s) will offer you the same performance as any other class in your phone.
The limitation is not the speed of the card.
Buy a brand name card with the capacity you require and be done with the complexity.
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I don't know too much about transfer rates but basically what you're saying is that a a brand name class 2 card will be just as good as say a class 6? I'm in the market for a new SD card as well, and the class 6 cards are much more expensive. I'm wondering if they're worth it.

jasrups said:
I don't know too much about transfer rates but basically what you're saying is that a a brand name class 2 card will be just as good as say a class 6? I'm in the market for a new SD card as well, and the class 6 cards are much more expensive. I'm wondering if they're worth it.
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No, in a phone they're not worth it at all and people who say so are either selling snake oil or are embarrassed because they've paid for one and are foolish for doing so.
The best I can do just at the moment is this:
wikipedia said:
In applications that require sustained write throughput, such as video recording, the device may not perform satisfactorily if the SD card's class rating falls below a particular speed. For example, a camcorder that is designed to record to class 6 media may suffer dropouts or corrupted video on slower media.
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The Nexus, like probably every other phone out there, is a) not typically used for high rate sustained write activities and b) is designed to write to class 2 media to begin with.
If you have a large, highly fragmented sd card higher speeds will help. This of course is easy to avoid in the first place.
Get a higher capacity, class 2, brand name card for the same money and you're away laughing.
NB - If somebody waves a magic wand and all of a sudden the Nexus can record video at 1080p at a high enough bitrate then perhaps my advice would be invalidated... but don't hold your breath for that to happen...

djmcnz said:
No, in a phone they're not worth it at all and people who say so are either selling snake oil or are embarrassed because they've paid for one and are foolish for doing so.
The best I can do just at the moment is this:
The Nexus, like probably every other phone out there, is a) not typically used for high rate sustained write activities and b) is designed to write to class 2 media to begin with.
If you have a large, highly fragmented sd card higher speeds will help. This of course is easy to avoid in the first place.
Get a higher capacity, class 2, brand name card for the same money and you're away laughing.
NB - If somebody waves a magic want and all of a sudden the Nexus can record video at 1080p at a high enough bitrate then perhaps my advice would be invalidated... but don't hold your breath for that to happen...
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Thanks for the info man! I was obviously misinformed, you just saved me a bunch of money

so just curious. now that CM 5.0.8 comes with 720p recording, would a class 2 still suffice?

I am also searching the web recently to look for a cost-effective high vol microSD. My finding is: don't 100% trust the "class" specified by mfr. I used ATTO Disk Benchmark to test two 8G microSD that I have: Transcend 8G Class 6 and Sandisk 8G Class 4.
<Transcend Class6> Write: 6-10MB/s Read: 16MB/s
<Sandisk Class 4> Write: 14MB/s Read: 20MB/s
From similar test results on the web, it seems that Sandisk uses to under-state the performance of their card. Finally I get a Sandisk 16G Class 2 for my N1, and here is the test result with the same setting:
<Sandisk 16G Class2> Write: 7MB/s Read: 20MB/s
Although Sandisk only specifies it as class 2, it actually performs like a class 6.
I suspect the importance of the speed of the SD card too, coz I think the write speed into ROM, should be way slower than 6-7MB/s (correct me if I am wrong ^_^)... If the speed of v2.1 w/o app2sd is acceptable to you, then v2.2 with 6-7M write speed card should be logically fine with you.

fshek said:
I am also searching the web recently to look for a cost-effective high vol microSD. My finding is: don't 100% trust the "class" specified by mfr. I used ATTO Disk Benchmark to test two 8G microSD that I have: Transcend 8G Class 6 and Sandisk 8G Class 4.
<Transcend Class6> Write: 6-10MB/s Read: 16MB/s
<Sandisk Class 4> Write: 14MB/s Read: 20MB/s
From similar test results on the web, it seems that Sandisk uses to under-state the performance of their card. Finally I get a Sandisk 16G Class 2 for my N1, and here is the test result with the same setting:
<Sandisk 16G Class2> Write: 7MB/s Read: 20MB/s
Although Sandisk only specifies it as class 2, it actually performs like a class 6.
I suspect the importance of the speed of the SD card too, coz I think the write speed into ROM, should be way slower than 6-7MB/s (correct me if I am wrong ^_^)...
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huh that's interesting. i just might pick that up from amazon then..

I Dont think fragmentation makes any difference to write speed, these are not mechanical devices like hard disks.
Also defragging is pointless and shortens the life of the card by increasing the number of writes.

Sandisk 32GB MicroSD Class 2, how fast is this card?

My local retailer already has stocks for the 32GB Sandisk MicroSD Class 2 card, I know sandisk under rates their cards but Im wondering if anyone has this specific microSD card can tell me how fast it read/writes if its inside the phone..
If possible post some benchmark numbers and the name of the benchmark, no actual screenshot needed, I just want a basis of comparison so my current 16GB class6 Team brand. I really need the space more than the speed though.

Haven't checked the speeds, but I can watch 720p video from my Sandisk Class 2 card, can't think of a use-case scenario where you need to read quicker than that. If you're writing large quantities of data to the phone very often the write speed may be an issue, but I suspect many people are like me and the only time they do that is when they first load their music collection onto the card.

NZtechfreak said:
Haven't checked the speeds, but I can watch 720p video from my Sandisk Class 2 card, can't think of a use-case scenario where you need to read quicker than that. If you're writing large quantities of data to the phone very often the write speed may be an issue, but I suspect many people are like me and the only time they do that is when they first load their music collection onto the card.
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Yeah, first load of music/movies into the card.

Please also remember that there is no standard way of measuring MicroSD speeds at the moment and the present system only really relates to the write speed. For playing content they will all be the same it is when recording HD video that the faster cards come into their own. I have also heard that all class 2 are actually class 4.

I just got the card now and the read speeds as tested by crystal disk is twice as fast as my Class 6 16GB the write speed is only slower at sequential w/c is 4.6MB compared to the 5.xx mb that my class 6 did but all the other write speeds are more than 2x faster!
$88 well spent!!
Yes its still $88 here and its the cheapest you can get!

For more information refer this link.
http://en.wikipedia.org/wiki/MicroSD

Micro SD max capacity and class type?

Hi all,
What is the maximum capacity Micro SD card size on the TF and also, what Class type do I need?
Thanks in advance

32 gb has always been the limit.

OK thanks, but what 'class' type? I see class 4 and 10 advertised?

well the class is the write speed of the card. The higher the number the faster the speed with 10 being the fastest. I use a class 4 that i had from my thunderbolt and that works just fine

Dont think it matters what class, it's just the write speed of the sd card.

And what all can you use this SD memory for?

Class just specifies the maximum write speed, but with day to day use in the transformer (other than transferring the initial media) it's the read speed that's the most important. You''ll be storing and opening your media from it (music, pictures, videos and PDFs or other e-reader formats most often). Usually a card with fast write will have fast read speeds as well but there can be some anomalies with certain cards so it's not always so clear cut. In my experience anything above a class 4 seems to work just fine. If you're working with a lot of larger video files though probably class 6 or above would be better (and as it's also a little more future-proofed). I would always prefer to go with a named brand class 4 or 6 rather than a non branded class 10 though.
Robert

rwniel said:
Class just specifies the maximum write speed, but with day to day use in the transformer (other than transferring the initial media) it's the read speed that's the most important. You''ll be storing and opening your media from it (music, pictures, videos and PDFs or other e-reader formats most often). Usually a card with fast write will have fast read speeds as well but there can be some anomalies with certain cards so it's not always so clear cut. In my experience anything above a class 4 seems to work just fine. If you're working with a lot of larger video files though probably class 6 or above would be better (and as it's also a little more future-proofed). I would always prefer to go with a named brand class 4 or 6 rather than a non branded class 10 though.
Robert
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Wrong its the minimal write speed. You use many words but give wrong info

Kaiser Chief said:
Wrong its the minimal write speed. You use many words but give wrong info
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You use few words, but flame plenty. Be polite please...

Kaiser Chief said:
Wrong its the minimal write speed. You use many words but give wrong info
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Click to collapse
Even that isn't the whole story because it's incomplete - the class of the card minimum sustained write speed of the card under optimal conditions (i.e. a brand new and completely unfragmented card). I'm sure someone else can improve on that definition further!
As to what speed of card you need, from sdcard.org:
Class 2 : H.264 video recording, MPEG-4, MPEG-2 video recording
Class 4: MEPG-2 (HDTV) video recording, digital still camera (DSC) consecutive photo shooting
Class 6: Mega-pixel DSC consecutive photo shooting, professional video camera
Class 10: Full HD video recording, HD still picture consecutive shooting
Planning on doing any of these with your TF?
I've been using good quality Sandisk Class 2 cards in all my Android devices since the original T-Mobile G1, and *never* had an issue with them. Plus when testing, I usually get a write speed of around 7.5MB/s.
Regards,
Dave

I use a class 4 16gb and its fine. No problems. I think the faster classes are over rated. I typically try to find a class 4 or 6. Both work great. Don't waste your money.
You can get a 16gb for about $25 and a 32gb for around $40
Asus Transformer 3.1 pwnd
www.MiiWiiChat.com
www.SnapSiteAdmins.com

FAssuming Asus implemented SD 2.0 standard, a 32 GB maximum storage capacity is your limit for any SDHC memory card. You can read more about it here: link.
As for which class you buy, it depends on what you're using the memory card for. Foxmeister answered with a class rating list. Do note that the higher the class rating, the more expensive the memory card is. Like wise with storage capacity. I recently bought my PNY 32 GB microSDHC class 10 memory card from buy.com for about $57. Caveat emptor with fake ones on eBay, especially ones shipping from China.

hoang51 said:
FAssuming Asus implemented SD 2.0 standard, a 32 GB maximum storage capacity is your limit for any SDHC memory card. You can read more about it here: link.
As for which class you buy, it depends on what you're using the memory card for. Foxmeister answered with a class rating list. Do note that the higher the class rating, the more expensive the memory card is. Like wise with storage capacity. I recently bought my PNY 32 GB microSDHC class 10 memory card from buy.com for about $57. Caveat emptor with fake ones on eBay, especially ones shipping from China.
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yep, picked up one of those "fakes on eBay". That really stunk.

[Q] How to check micro sd card speed capability on a phone beforehand

I am going to buy myself a 64GB micro sd card. I guess I will go with sandisk. But as there are certain sd types there come certain speeds. Such as UHS-ll, UHS-I ,and microSDXC. Now I want to make sure that my phone (SM-G3858) Galaxy Beam 2 is able to do r/w at certain speed levels. But how can I determine that? How can I check if the sd card slot takes UHS-I? I can do a micro sd card speed check when I already bought the sd card (with some apps). But is there any way to check the speed compability BEFORE you even buy the sd card?
I did 3 speeds test on my kingston 18GB MicroSDHC/SDHC Class 10 and the sd benchmark tests were ranging from (max): Read 401,31MB/s Write 10,45MB/s (400 seemed a lot to me, but thats what it said) So that would mean my phone supports at least UHS-l?
I was thinking to buy either the Sandisk Extreme at 45r/45w, the Sandisk Ultra Plus at 40r/lower write or the Sandisk Ultra at 30r/lower write. Or should I go with another brand? Any help is appreciated
thanks
:good:
EDIT: After searching for several hours to find the best 64GB micro sd card I decided to go for the Samsung Evo 64GB. It has full 5 star reviews on amazon and the price was way better than the Sandisk extreme plus. (I paid 37 euros including shipping) This is the best review I found:
"This is a very fast card, particularly suited to not only transferring files quickly but also running as a phone or tablet card for applications as well.
In phones and tablets one of the most important things is not just the transfer speed but also the IOPs that the card can deliver. Many class 10 cards have great transfer speeds but terrible and I mean terrible IOPs, often a 5 year old card easily out performs them in IOPs.
This card delivers in both areas, fast class 10 transfer speeds 23mb read, 15mb write but also 482 write IOPs and 1668 read IOPs.
That's IOP speeds that are slower than an SSD but way faster than a hard disk. Bare in mind that some class 10 cards give 4 write IOPs and you can see why I'm impressed. The only card I have seen outperform it in IOPs it the SanDisk Extreme Pro and they are seriously expensive and not available in 64gb. Testing against the third SanDisk I have, a 32gb ultra, is almost funny as the ultra only gives 15 write IOPs under the same conditions, making this card 30 times faster.
What does this mean for normal use, well it translates into an excellent general purpose card, that even if it doesn't have the official fastest transfer speeds will actually perform much better in the real world. Which is why its getting such rave reviews on here for speed (so long as you get a genuine one!)
This was tested in my Dell Venue 8 tablet using the built in card reader. For the techies (if you've got this far then I assume you are)I am actually using it to run Server 2012 virtual machines in VMWare workstation and the performance is surprisingly good, I would even call it snappy!
Full Crystalmark disk scores below.
Sequential read 23.66mbs write 16.03 mbps
512kb random read 23.25mbs write 15.67 mbps
4k random read 6.40mbps write 1.850 mbps
4k random qd32 6.65mbs write 1.92 mbps
Parameters 5 iterations 1000mb sample size.
Tested on the 64gb Samsung Evo microsdhc."
So anyways..At one point I´ll wait until the price of the Sandisk 128 GB Ultra plus card drops, then check for benchmarks and try out that one. Enjoy the info, im off

Sandisk is having quality issues with 64Gb cards, with many consumers reporting dead cards in a few months.
The Samsung you have choosen is awesome, along with transcend which are rock solid.
http://www.newegg.com/Product/Produ...transcend_64gb_microsd-_-20-208-927-_-Product
https://www.youtube.com/watch?v=et3gTrPUwC4