yashsingh1/xdaforums huggingface dataset:
[HD7 General] tillyboo:
Success!

Hey everyone! I ordered a 32GB card from Play.com (it does say on the product page that it's the B35 model)

When I received it, i put it in my phone...and it works! It did lag sometimes...maybe when opening an app or typing a text...but it seems to of stopped that now...So it works great!

I now have 29GB free space and am currently filling it up with music and photos!

Should of fixed my broken memory error as well and no more spontaneous reboots! Woooo!

So yeah, the 32GB memory card on play.com does work! (For those of you in the UK).

(I'd link it but not allowed D: )
[HD7 General] Z80-Man:
LMAO :D

Of course !

WP7 formats the whole internal + SD card memory as a unique storage space, so you can never change it without corrupting all the stuff ! :D

Why do you think the SD card is hidden on the HD7 ??? It's actually considered as non removable. You are NOT allowed to remove or change it. Period.

Changing the card obviously means you have to format all the system again, which is generally done automatically by performing a hard reset (meaning you will loose ALL your data).

Then you will restart with a fresh new system, using your new card size.

But you will never be able to change the card on the go as you could do under Windows Mobile. Windows Phone 7 was just not made for that.

Of course, it's totally useless to format the card from a PC before putting it in the phone, as it will have to be reformatted along with the internal memory. You would just be wasting your time.

Just put the new card the size you want (it should be a larger one, unless you're a masochist, of course :D) once and for all, then hard reset, and never touch it again.
[HD7 General] 5ft24:
have to set read/write mode in the printers options/settings... they default to read only
[HD7 General] rilin0007:
Very nice. Really need! Thank you.
[HD7 General] kenneth_kagai:
Are 64GB Micro SDXC Class 6 cards supported by Mango?

First of all - big thanks for the post - I'll actually be donating something to u if it works for me :) -> now, my main qestion is whether SDXCs are recognized - specifically 64GB sdxc. I'm planning on going all out and purchasing a 64GB SDxc MicroSD from Amazon (the Komputerbay 64GB Micro SDXC MicroSDXC Class 6). Theyre relatively new, definitely less than a year old - so I'm wondering whether that file format will cause performance or other issues against windows Phone 7.5 (mango). Thanks
[HD7 General] tillyboo:
If you could try it and let us know, that'd be brilliant! Though I'd recommend using SandDisk as they seem to be the only card manufacture that work...
[HD7 General] dorianmuthig:
No, SDXC cards are not supported. SDXC cards will simply not be recognized by the phone, the HTC SPL doesn't support them. You can only use microSD or microSDHC cards in the phones, and due to the fact that there are almost no microSDXC cards on the market as of yet, it can take quite a while for the first phones (not just Windows Phone 7 Series) to support them.
[HD7 General] saijujt:
Have anybody tried Sandisk MicroSD 32 GB Card after upgrading to WM 7.5 ?? all works ok ??
[HD7 General] dorianmuthig:
Yes, everything is dandy with mine. As said, you just need a compatible card.
[HD7 General] lukelyle:
hey i want to do this now but for me to do it i need to re-use my 16gb after, as i am swapping it with another phone with a 32gb, and someone told me that the 16gb sd is locked like the hd2's sd after installing windows. i just wanted to know how to unlock the sd? please reply as i want to do this nowwww
[HD7 General] dorianmuthig:
Use a Symbian S60 or newer mobile phone and format the card with it.
[HD7 General] boysie:
the B35 wont always work, see here:

http://xdaforums.com/showthread.php?t=1261688

:(
[HD7 General] dorianmuthig:
Yes, of course not. There are bad cards everywhere. Your best odds are with a B35(A) Class 2 card or the J35(A). Your best bet is buying a card from a seller with a good return policy and returning the cards that don't work.

If you need absolute assurance you get a working card, I can upgrade your phone for you, if you send your phone to me for service and pay a small fee + the sd card + return shipping. If you're interested, please request a quote.
[HD7 General] alexdonwarez:
nice guide man
[HD7 General] cooperfdiv:
32GB is it?

I was wondering if 32GB is the biggest you can put into the phone. Maybe I can put in a 64GB Micro SD.

Thoughts?
[HD7 General] dorianmuthig:
Yes, 32GB is the largest capacity SD card you can put inside the device, because that's the limit of the SDHC standard. Larger cards are SDXC cards and those aren't supported by the phone. If you put an SDXC card in the phone one of two things will happen: Either the card is smart and pretends to be an SDHC card (see Kingmax cards) capping itself at 32GB (might show as corrupted at first) or it simply won't be recognized. Many Android phones do work with the recently released SanDisk® Mobile Ultra™ microSDXC™ memory cards and odds are that HTC Windows Phones with a recent SPL bootloader do recognize them properly (even though they are UHS-I cards), but I don't know if they'll pass the performance test, nor are they very cheap. If you want to try it, be my guest.

Available card models are: SDSDQY-064G-U46A (Europe) , SDSDQY-064G-A11A (Americas & Pacific)
[HD7 General] 5ft24:
I received my B35A last night, and it shows as class 4 on the card...

As a lot of people experienced, it works great with pre-mango releases, but in mango I get tons of reboots, freezes and the dreaded memory card error page... The 16GB I pulled out was a class 4 sandisk...

Is the J35A even available in the US?
[HD7 General] alexsay:
Thanks for HowTo ;-)
[HD7 General] dorianmuthig:
Well, to be honest with you here, if you had an incompatible card that apparently worked great before but no longer does with the Mango update, you weren't getting the necessary performance and have been using an awfully slow phone without noticing it.

I don't know, but there's always the possibility you may find them on eBay, just ask the seller what type they're selling (have them check the SanDisk order number) and have it shipped to you directly from Hong Kong. To be fair here though, many of the "newest" cards (any type; ask the seller, if they got their order directly from SanDisk and make sure it's less than two months old) will work just fine and even operate at class 6 performance. If it doesn't return it and ask for a replacement until you get a card that works.
[HD7 General] 5ft24:
It's been the factory card until last night... and it worked great with mango and previous versions... Once the phone seemed hosed after the 32G card was in, I flashed the TMOUS nodo, and it worked fine... loaded up about 10G of music, photos and video, and all worked well, no freezing vids or skipping songs... Flashed back to (all 3, one at a time) DFT's mango, Deep Shining, and Infinity V1.0. all 3 wouldn't work. couldn't make it completely thru the phone setup with out the reboots, freezing and failed/incompatible memory card error. With the 16G card back in, they work fine.

With the 32G card, I did just the sequential read/write test with 500MB file size in Crystal Disk, and got 10.6MB/s read and 6.7MB/sec write... was in too much of a hurry to complete the other tests, so I *ASSUMED* it was good... and because the old card was locked, couldn't access it to do the tests on it to see what it was... Blah.

Sent an email to SanDisk to see what that's worth...

What speeds from Crystal disk should we see to consider the card useful?
[HD7 General] dorianmuthig:
How long did initial setup take with your 32GB card? If it took more than 60 seconds for the application installation phase, your card is bad. If you get a memory corruption error after resetting your phone to factory settings via the GUI, your card is bad. If you get video playback problems in addition to that, your card is too slow.

Since you didn't test 4K random operations, which are the most important, there is no telling what your card will do.

As for the locked card (secure digital password protection), try formatting it in a Symbian S60 or newer Symbian based phone. Go to a T-Mobile store and ask if you could use one of the demo devices, they usually let you, if you explain to them what you are trying to do, it'll only take a few seconds anyway.

You need at least 4MB/s sequential read and write, 4MB/s 64K random read (or 50+ 64K IOPS) and write (CrystalDiskMark doesn't have those, try ATTO Disk Benchmark) and at least 1MB 4K random read (or 200 4K IOPS) and write. All operations with a queue of 3 or less and uncached.

Even if your card passes the software benchmark test, it may still not work in your phone due to special sector alignment or SDA/SDIO problems, but any card that doesn't pass will definitely not work.
[HD7 General] Cadetto Entusiasta:
I gave up on upgrading the memory on my HD7.

With two cards that I have mounted, both the phone told me that they were damaged or corrupt.

Now, however, I would like to reuse these cards on other devices, but I will totally read. Also mounted on the PC, I would not be detected.

What can I do?
[HD7 General] dorianmuthig:
The answer is in the post directly above yours. Use a Symbian device (like the Nokia N8 or E7) and format the card using it. If you don't have one, go to a mobile phone store and ask if you can use one of their demo devices.
[HD7 General] oce:
I have the same problem with my 32GB card but the real problem is the original card (8GB) that not work. :(
[HD7 General] dorianmuthig:
Get your phone replaced under warranty then, don't try to switch the card yourself, unless you want the higher capacity and your warranty void in the process.
[HD7 General] dmw_4814:
Since the SanDisk SDSDQ-032G-B35A microSD card is listed as one of the only cards that will work well when upgrading the memory of an HTC HD7/HD7s (or any Windows Phone 7 handset, for that matter!) because of it's read/write performance, is it also true that it would be one of the best performing memory cards in, say, an Android phone?

I'm asking because I currently have a Samsung Focus and was looking forward to buying a Samsung Focus S at AT&T tomorrow - that is, until I found out it only has 16GB of memory! Therefore, I'm either going to just keep my Focus or I'm going to exchange it for a Samsung Galaxy S II, Samsung Skyrocket, or an HTC Vivid (I just got my Focus last week, so I can still exchange it). In any case, I want the best performing card in my phone.

I have a SanDisk 32GB card in the Focus now, but it was one of those "bulk packaging" cards I got on Amazon last year. It works O.K. in the Focus (doesn't seem lightning fast, though), but I had the same card in an HD7s and it started causing massive rebooting!

Dennis
[HD7 General] 5ft24:
Dennis,

I have the B35A and that's what is not working... Seems SanDisk made a change in manufacturing, and there is something different in the newer cards that is making them fail under Mango in the HD7...
[HD7 General] dorianmuthig:
Yes, those cards would also be very fast in other phones, if you have a compatible phone, you should however try the SanDisk Extreme cards or the Micron Photo cards with class 6 or 10, they're faster for video recording and taking photos, even if they're not as suited for application storage.

If you want the best performing card for your phone and it is not a Windows phone, use any card you want and go by the class rating, random I/O isn't as important for other phones. If you absolutely want it however, try the new class 6 cards from the Toshiba/SanDisk plant (you may need to ask vendors where they're sourcing their cards), but they're a bit pricey right now.

The Samsung Focus is a bad example, their card reader is compatible with all cards and has a cache which messes with the internal performance check Windows phones do at bootup to ensure everything will be fine.

For you with the card that doesn't work, that's because of the 8KB flash and 1024KB blocks (that's less parity bits and cheaper to produce), return it under warranty, you'll usually get one of the newer cards with the right 4KB sectors in 512KB blocks.
[HD7 General] Ttblondey:
How do we to know which class are we getting when we buy a 32 gb card.
[HD7 General] dorianmuthig:
1. It's written on the card itself, the number in the circle is the card class.

2. Look at your order information or the product page of the manufacturer.

3. Through testing, SDA standard defines the class number system to be the minimum fragmented sequential write speed. This is usually the speed at which blocks (groups of 16-128 NAND flash sectors) can be written to randomly.
[HD7 General] boysie:
You can use your HD7 to recover the SDcards.

You can use your HD7 to recover the SDcards.

See my Tut here: http://xdaforums.com/showthread.php?t=1337781
[HD7 General] dorianmuthig:
No offense, but this is unnecessarily complicated and may break your phone or severely compromise its security.

Going to a mobile phone store and asking if you can use a demo device of a Symbian S60 or newer based phone or any current Nokia phone should be much simpler (except Lumia series, and the N9), there aren't any non-Nokia Symbian phones in non-Russian markets, if they even have SDHC card slots is doubtful.
[HD7 General] boysie:
I'm not suggesting you leave the rom installed. Heck flash the stock Mango rom back on after you finshed.

Complicated...not really although i agree if you have never flashed your device it is a bit daunting but well with in the relm of any resonable user willing to read his way though the steps.

Any way the option is there if you chose to use it. previously it was dificult to try this and was either not possible or just dificult to understand.

Boysie
[HD7 General] dorianmuthig:
You are aware that you only have to compromise a system once to allow any data theft, right? Also, due to the nature of how mobile phone operating systems are structured (see SPL), once you flashed something potentially bad, the only way to go back to a secure scenario is to remove the internal flash chip and flash it externally from a trusted system (e.g. use a JTAG adapter and flashing device).

To simplyfy: Install malicious code your mobile phone bootloader once and chances are it will stay there forever.

Now I'm not saying the ROM you suggested contains malicious code, but since you can't know for sure, you really should refrain from using it unless you trust its author.
[HD7 General] boysie:
A Little off topic but never the less.

flashing your phone with any thing other than STOCK Signed would suffer the risks your pointing out, but you are questioning the XDA rom and spl builds here.

I'm unsure though that you coudl some how retain some code even after flashing with stock rom.

The process used in the tut is simply to alow you to instll the app that tells the phone to remove the Secure lock on the card so it can then be read in a PC like any other SD card. Remaining on that rom/SPL is then your own choice. Seeing as you MUST hard reset and open up the phiscial device to change the SD card doign all this is not for the faint hearted and neither is flashing. Security I hear your remarks but I belive in this situation is a littel over the top seeing as you not goign to have ANY data for it to access and its no problem OVERWRITTING all this with the stock ROM, unless your going to try and prove this is not the case and in some way DFT or XMob are trying to collect your bank details or some thing. :)

anyway the tut is there if you want to use your hd7 to remove the secure lock on you SD card with out leaving the couch :)

I for one feel safe that your concerns are any thing but missplaced. bu thtis is obvioulsy a personal choice installing unsigned modded roms and bootloaders that enable the unsigned roms.

Ppl can make their own choice, its a cool world we live in :)
[HD7 General] dorianmuthig:
It is very unlikely that their hacked SPL software is persistent (emulates flashing to own INT and boot code areas and persists on device reboot, pretending to be the software you overwrote it with which's visible functionality it provides and supports anyway), but who knows...

As said, it is still easier to format the card in a secure digital protection compatible device, like a Nokia phone. I don't know about Android and if they added proper support with 4.0, but you could try that too.
[HD7 General] boysie:
back on track/thread topic,

I found my problem now that i can perf test it in windows

-----------------------------------------------------------------------

CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo

Crystal Dew World : http://crystalmark.info/

-----------------------------------------------------------------------

* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 18.022 MB/s

Sequential Write : 4.404 MB/s

Random Read 512KB : 17.275 MB/s

Random Write 512KB : 0.538 MB/s

Random Read 4KB (QD=1) : 1.948 MB/s [ 475.5 IOPS]

Random Write 4KB (QD=1) : 1.093 MB/s [ 266.7 IOPS]

Random Read 4KB (QD=32) : 1.916 MB/s [ 467.8 IOPS]

Random Write 4KB (QD=32) : 1.166 MB/s [ 284.6 IOPS]

Test : 4000 MB [D: 0.0% (0.0/29.7 GB)] (x1)

Date : 2011/11/08 18:53:22

OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)

I did notice though that if i used a T-flash rubish micro sd to usb converter i got as low as Random Write 4KB (QD=1) : 0.077 MB/s [ 18.8 IOPS]

But putting it in my Windows Slate SD slot the 4k write was much better, but the 512k random write suxs balls so causes the phone to start crashing after a few days of use.

This was a B35 btw. Another one coming from play.com but i expect it will be much of the same.

:(
[HD7 General] Siki78:
Please helpppp!

I have a by 32gb sd card but dont work for me is SDSDQM-032G-B35

-----------------------------------------------------------------------

CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo

Crystal Dew World : http://crystalmark.info/

-----------------------------------------------------------------------

* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

Sequential Read : 19.841 MB/s

Sequential Write : 4.287 MB/s

Random Read 512KB : 17.966 MB/s

Random Write 512KB : 0.325 MB/s

Random Read 4KB (QD=1) : 1.999 MB/s [ 488.1 IOPS]

Random Write 4KB (QD=1) : 0.106 MB/s [ 25.8 IOPS]

Random Read 4KB (QD=32) : 2.186 MB/s [ 533.7 IOPS]

Random Write 4KB (QD=32) : 1.335 MB/s [ 325.9 IOPS]

Test : 4000 MB [G: 0.0% (0.0/29.7 GB)] (x1) <All 0x00, 0Fill>

Date : 2011/11/08 22:54:03

OS : Windows 7 Home Premium Edition SP1 [6.1 Build 7601] (x86)

What is wrong there?

Thanks
[HD7 General] dorianmuthig:
1. Your 4K IOPS (bold red) are too slow. You need at least 200, ideally something near 250.

2. Your 512K IOPS (bold orange) aren't the same as your sequential write speed, hinting that your card uses 1024K blocks or 8K NAND flash sectors. Those cards aren't compatible with Windows Phone.

3. You ran the test with zero fill or 0x00 bytes (italic bold red), this produces bogus results, because the integrated flash memory controller in the SD card can filter those, optimize write operations or not write anything at all to the NAND and instead mark it for idle NAND flash delete. The same goes for read operations on empty space since read tests are performed on the same area after the write test. Please run the test again using random value bytes.
[HD7 General] ricky_jose:
Hi,

Thank you very much for the infos. I have upgraded my HD 7 - 8 Gb to 32 Gb yesterday with mango update all works fine with me (think more better and faster). Bought SanDisk Micro SDHC 32GB Class 4 SDSDQM-032G for 29 Euros from amazon.de .
[HD7 General] Siki78:
I have the same card but dont work for me???
[HD7 General] dorianmuthig:
As said many times before, there is no distinct way to tell the 8K NAND and the 4K NAND cards apart. You need a 4K NAND card that passes the benchmark test and everything would be fine. There is no way to be certain however, because manufacturing processes change very frequently.
[HD7 General] bursche57:
Hallo!

I also upgraded my HD7 with 32GB succesfull.

Before buying a 32GB card i had a look what was inside.It was a Sandisk 8GB Class 4.So i went to a local store and found a 32GB Sandisk Class 4.It was the same article number as in the post for compatible cards (B35 at the end).

I havent tested it with mango yet,but it works perfectly at the moment.
[HD7 General] Snow Monkey:
Just as a note I rescued my 32gb card using my brothers Nokia N7 mini!
[HD7 General] 5ft24:
My SanDisk 32GB B35 also works great pre-mango...

Once any Mango ROM is installed, it won't even complete the phone setup.... Card is way too slow on Random read/write... SanDisk is rma'ing my card.

---------- Post added at 09:35 AM ---------- Previous post was at 09:32 AM ----------

Dennis,

B35N and B35A are the same card... N means no adapter, A means with adapter
[HD7 General] 5ft24:
has anyone tried this to see if it fully unlocks the MicroSD for use in a PC???

http://xdaforums.com/showthread.php?t=1337781
[HD7 General] kemberdog:
hi I'm currently searching for a micro sdhc card now but I've been reading and am now wondering, is it even worth doing if it won't run mango roms?
[HD7 General] dorianmuthig:
You just need a compatible card and it will work, even with the Mango update.
[HD7 General] kemberdog:
well i went searching around and all i found was a 32gb card (sandisk) but it was a class 4 and i don't think it was a b35 (even though i wouldn't have been able to tell seeing as i didn't really know where to look lol) so i went on sandisk and there 32gb micro sdhc card all only end in a11 or something like the, is that format not compatible?
[HD7 General] dorianmuthig:
Orange means it's critically below spec, but may still work, albeit with slightly less performance (negligible).

Red means that this is unacceptable and the card will either not work in the phone or decrease performance so significantly that you shouldn't use it and phones that test storage performance at boot will not accept it at all and show a corrupted storage card message.
[HD7 General] 5ft24:
Which explains that even with the factory 16GB card, I would occasionally see a lockup or reboot with the phone after going to Mango

Be nice if people with different brand cards would run them on Crystal Disk Bench so we could have a comparison of what they perform like... I'm curious to see what the older Class 2 Sandisk 32G cards do, since they seem to be the best performing for the upgrades to 32G...
[HD7 General] Dun3rider:
I know im asking a lot but is their anyway you can make a video of this. I know the instructions are very clear but i am paraniod about whether this is possible or not, i tried to pull of the back cover (The bottom part that says windows phone) and it didnt seem to come off. Its not that i dont understand what to do its just that i dont want to try it until i actually see a video of someone doing it, hope you can see from my perspective thanks
[HD7 General] Wolfman017:
Hi, you can find a video made by TheRealStJimmy here : http://www.youtube.com/watch?v=8EcGUX3NwnQ