yashsingh1/xdaforums huggingface dataset:
[HD7 General] 5ft24:
for the test, you need to re-run it with the size set to 4000MB.

with the smaller tests, you read caching speeds and not the true speed of the card.
[HD7 General] dorianmuthig:
That and you only need to run 1 pass, not 5.
[HD7 General] johndouglas007:
Great

This is a wonderful opinion. The things mentioned are unanimous and needs to be appreciated by everyone.
[HD7 General] dazza9075:
but the question is,how do we know cards made at the back end of last year work and more importantly how can we tell them apart from older ones, im looking to upgrade and have diving in to the net for weeks and cant find a consistant card. its still very much hit or miss if they work from what i can tell
[HD7 General] Havenger:
When the Sticker on the Package is right, then I have a SDSDQ-032G-E11M in Class 4 ! And it they works good ( But I not many tested in the short Time ) ...
[HD7 General] ruyzalim:
Hello , i bought a sandisk 32 gb from expansys a few months ago and everything is working fine go to www.expansys.com and in the search box put this reference: 219397

in the store choose your country maybe theres a store in your country , hope i was useful

:D
[HD7 General] Vaer0:
Might give this a go :D
[HD7 General] dorianmuthig:
This is just as valuable as saying you bought it on Amazon or eBay. You either just got lucky and got one of the old compatible cards or one of the newest ones from a recent shipment. Your next order could have you end up with an incompatible card from their storage just the same, in which case, no matter where you bought it, you just have to send it back and ask for a replacement.
[HD7 General] ruyzalim:
hum.. i understand
[HD7 General] Miguel12345:
Just for you to know, I wrote my experience in another thread about a Samsung 32GB Class 10 that I put in my HD7 two days ago, runs great and fast : http://xdaforums.com/showthread.php?p=21836587#post21836587
[HD7 General] dorianmuthig:
Samsung cards work great, unfortunately they aren't available in retail as Samsung only sells them in bulk to their OEM partners (where they end up in devices).
[HD7 General] gesamgr:
guus is this card compatible with the HD7? thanks

http://www.ebay.com/itm/Retail-Sand...gital_Camera_Memory_Cards&hash=item3f0f9f5897
[HD7 General] dorianmuthig:
That's impossible to tell without an actual card to sample it from the batch to determine the NAND type inside. If it's a recent batch it should work. If you want to buy a card you should buy one from a reseller with a good return policy so that you can get a quick replacement, in case it doesn't.
[HD7 General] 5ft24:
Fry's is having a sale on Samsung 32GB Class 10 MicroSDHC cards for 34.99

Couldn't pass it up.

Unlocked my SanDisk 32GB Class 4 B35 card and removed it from the HD7. Did a full bench with crystal diskmark 3, then followed up with a full bench on the Samsung.

Put the Samsung in the phone after and it seems to run faster/smoother with all the apps.

Here are the benchmark results of both:

32GB SanDisk Class 4 SDHC

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

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 : 23.144 MB/s

Sequential Write : 5.866 MB/s

Random Read 512KB : 22.172 MB/s

Random Write 512KB : 0.516 MB/s

Random Read 4KB (QD=1) : 3.650 MB/s [ 891.1 IOPS]

Random Write 4KB (QD=1) : 1.452 MB/s [ 354.5 IOPS]

Random Read 4KB (QD=32) : 3.092 MB/s [ 754.8 IOPS]

Random Write 4KB (QD=32) : 0.624 MB/s [ 152.2 IOPS]

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

Date : 2012/01/28 17:08:27

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

32GB Samsung Class 10 SDHC

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

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 : 23.141 MB/s

Sequential Write : 12.166 MB/s

Random Read 512KB : 22.644 MB/s

Random Write 512KB : 10.689 MB/s

Random Read 4KB (QD=1) : 6.251 MB/s [ 1526.1 IOPS]

Random Write 4KB (QD=1) : 0.678 MB/s [ 165.5 IOPS]

Random Read 4KB (QD=32) : 6.481 MB/s [ 1582.2 IOPS]

Random Write 4KB (QD=32) : 0.675 MB/s [ 164.8 IOPS]

Test : 4000 MB [H: 0.0% (0.0/29.2 GB)] (x1)

Date : 2012/01/28 17:40:54

OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)
[HD7 General] dorianmuthig:
PNY doesn't manufacture SD cards or NAND. They're probably a recent batch of the "Extreme" cards from the Toshiba/SanDisk fab. Those should work great so long as PNY doesn't change their supplier or card type for rebranding.
[HD7 General] 5ft24:
I screwed up... The new card is Samsung...

sorry... PNY was the new 16GB ddr3 memory I bought
[HD7 General] oce:
There's a way to verify if battery is faulty? :confused:
[HD7 General] dorianmuthig:
Yes, try a different battery and see if the problem remains, if it doesn't you've got your answer.
[HD7 General] Cjmyukon:
This post helpped alot! Great photos and instruction! My hd7 was stuck on the bootup screen, after doing this it works better than ever and with more memory a well. Slightly longer time spent on start up htc screen though.
[HD7 General] oce:
Hi bro,

Thanks for your answer but i meant through software because i've not another battery for try.
[HD7 General] dorianmuthig:
That won't work because you are unable to exclude all other factors, but you can try going into a low reception area power on your phone and start an app that uses data or call someone. If your phone resets or powers off shortly after, but doesn't in an area with very good reception, it is likely your battery that is faulty.

By the way, batteries are really cheap: http://www.ebay.com/sch/i.html?_nkw=HTC+HD7+battery

I have 5, because they only last about two hours of intense usage and I've got to get through the day when I'm on the go... so far I have two that don't work properly anymore.
[HD7 General] aulove:
I have a PNY 32GB class 4 SDHC micro card. Is this brand, type...copatible? from anyones exxperience? Thanks
[HD7 General] dorianmuthig:
PNY doesn't manufacture cards. It depends on the NAND flash inside the SD card they rebranded and how old it is. Recent SanDisk/Toshiba or Samsung cards should work just fine. Unfortunately there is no way to find out the actual manufacturer and type without destroying the card and reading the NAND type label print on the silicon die with a microscope. Make a backup of your phone during the next firmware update and try the card, if it doesn't work, put the old card back in and restore your phone using the instructions on windowsphone.com. If you decide to replace the card, you will loose all information (apps, settings, text messages and any other data) stored on your phone and you cannot restore a backup of a phone with different storage capacity or different phone models (must be same phone model with same storage capacity).
[HD7 General] tugcnt:
know how to

i just bought one of tmobile last hd7 and bought the recomended sdcard to udgrade want to know if i will have to buy all the apps agian or will i just be able to redownload i have done all the updates to mango and want to make sure before doing a hard reset also does the sandisk class 10 64gb or any 64gb class 10 work on this phone
[HD7 General] KuraiTsubasa:
Thanks for this. my 8gb wasn't enough for me since I like to put video series on my phone. I was kind of hesitant at first, but I decided to give it a go. I thought something would go wrong because I had a B35N, but all works fine.
[HD7 General] dorianmuthig:
You do not need to buy any of your apps again, if you reset or replace your device. However, some of your apps might have been removed by their authors form the marketplace and you will not be able to reinstall those.

The HTC Windows Phones only support SD and SDHC cards, which limits the maximum capacity at 32GB of allocatable space. SDXC cards (capacities >32GB) may or may not work with an update to the bootloader ROM, though it is unlikely that HTC will implement SDXC support on phones without user-servicable SD card slots.
[HD7 General] oce:
Ok. I'll try this method. Thanks for your help. :)
[HD7 General] Ttblondey:
Anybody try Transcend 32gb of any class?
[HD7 General] dorianmuthig:
No, nobody tried them, for one simple reason: most SanDisk cards work. And they don't break the bank, either.

If you wan't you can try the card yourself, nothing's stopping you.
[HD7 General] xam4:
Does this also work with Nokia Lumia 800?
[HD7 General] dorianmuthig:
No, the Nokia phones don't use SD cards for the storage area. The Lumia 800 uses the Hynix H26M52002CKR 16GB NAND chip. Now, you could replace that with a soldering air gun and an eMMC 4.41 compatible replacement in the capacity of your choosing (like the H26M64002BNR 32GB or the H26M78002ANR 64GB), but I wouldn't be so sure that this would work the way you want it to, nor is this a very easy thing to do, without a soldering robot to add the new chip and even breaking the old chip you want to remove by overheating it. You would also need to buy at least 100 of the new chips, and at ~126 bucks a pop that could be a bit steep.

More info here: http://www.hynix.com/mail/newsletter_2011_01/eng/sub02.html
[HD7 General] vrassouli:
Hi,

if I replace the memory with a new one, what happens to the OS?

I have updated several times and now using the latest one, if I replace the memory and reset the phone, will the OS be downgraded or still using the latest version?
[HD7 General] dmw_4814:
Changing the MicroSD card will NOT affect the operating system or any updates at all (other than causing it to lag or not work at all, if your memory card happens to NOT be compatible with the phone).

Dennis
[HD7 General] dorianmuthig:
The OS is stored inside the flash memory of the Qualcomm SOC of the phone, changing the SD card will not affect that copy which is copied to the SD card when you initialize or reset the phone.

This may however be different for those phones that do not use SD cards (inside or accessible via the battery).
[HD7 General] rille31:
Im one of thopse who succesfully updated a hd7 to 32gb :)

Now Im getting a htc titan (windows phone)

Can I use the same 32gb card on that one?
[HD7 General] dorianmuthig:
No, the Titan uses a Samsung 16GB BGA flash chip that's soldered to the system board. There is no SD card slot in the device.
[HD7 General] rille31:
Bummer but thank anyway :)
[HD7 General] :
Has anyone managed to put a 64GB card into there HD7 because i saw someone on eBay selling one with 64GB a while back.
[HD7 General] dorianmuthig:
No, because any SD card larger than 32GB is an SDXC card and those are so far not compatible with the HTC SD card implementation on Windows Phones. The chances that HTC will add support are also very slim, since their newer phones use soldered on NAND flash chips and upgrading the SD cards was never a supported feature in the first place.
[HD7 General] :
But ive seen at least 3 reports of people successfully using a 64gb card. I know 3 not alot but its still something
[HD7 General] dorianmuthig:
Yes, it works in select android phones, but not Windows Phones...
[HD7 General] kaza09:
card model

hey,

is it okay to put a sandisk SDSDQ-032G-A11M?

cuz dats the only model i'm findin in the market ryt now.

im from india..

thanks
[HD7 General] dorianmuthig:
If it has been manufactured recently, you will be fine with any SanDisk/Toshiba or Samsung made microSDHC card. Try it, if it doesn't work contact warranty services or return the card.
[HD7 General] Siki78:
Hi all!

What is wrong with this card:

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 : 15.681 MB/s

Sequential Write : 7.591 MB/s

Random Read 512KB : 14.904 MB/s

Random Write 512KB : 0.519 MB/s

Random Read 4KB (QD=1) : 3.762 MB/s [ 918.5 IOPS]

Random Write 4KB (QD=1) : 1.455 MB/s [ 355.1 IOPS]

Random Read 4KB (QD=32) : 3.562 MB/s [ 869.5 IOPS]

Random Write 4KB (QD=32) : 0.350 MB/s [ 85.4 IOPS]

Test : 4000 MB [G: 0.0% (0.0/14.8 GB)] (x1)

Date : 2012/04/15 19:41:54

OS : Windows 7 SP1 [6.1 Build 7601] (x64)
[HD7 General] dorianmuthig:
It's either one of the 8K sector cards, or you got one from a bad batch. Try to get it replaced with another one.
[HD7 General] onukomer:
i bought a toshiba 32gb microsdhc card and put it my hd7 and installing apps screen is about 10 mins isnot change. what will i do?
[HD7 General] dorianmuthig:
That card appears to be too slow for Windows Phone. Replace it.
[HD7 General] onukomer:
thnx my friend:(
[HD7 General] X_Splinter:
So the internal memory a damn MicroSD card (and the cheap ones) They should make it removable like other HTC phones...

Nice tutorial by the way
[HD7 General] djadry:
Can I replace the MicroSD card if I'm using Nextgen+ ROM?

Isn't the os stored on the SD card?
[HD7 General] dorianmuthig:
I'm pretty sure it doesn't matter what ROM you use, unless you know it has a modified OS on it that relies on the SD card due to lack of space in the base flash.

The OS is stored in a separate 256MB or 512MB flash chip, only changes you make to the OS files from within the booted OS (this excludes ROM flashing) will be stored on the SD card.
[HD7 General] tonictone:
memory card pact up can't find replacement

Hi,

I've got an asain verion HD7 with 16gb card. The other day it came up saying no card inserted or card damaged. Took card out using this sticky and its def not working, but can't find a replacement card the sticky says I need a sdsdq-032gb-j35, I found on amazon jp but they wont post abroad. Bought a sdsdq-032gb-bulk class 4 but wasn't recognised in phone and also brought a sdsdqm-032gb-b35a and this didn't work. HTC wont tell me the codes for the card and they want £100+ as its not covered under the warranty.

Can anyone tell me where I can get a card from or if there is a way of getting one of the cards I have brought to work. Appreciate any help on this, thanks.
[HD7 General] dorianmuthig:
Get any SanDisk card you can get your hands on from a seller with a good return policy. If it works, good, if it doesn't or your phone performs poorly, return it and ask for a replacement. All recently manufactured cards should work just fine though...
[HD7 General] tonictone:
memory card pact up can't find replacement

Reply to Dorianmuthig

Is it best to stick to a 16gb as this is the stock size or can I go for 32gb. So the code of the card doesn't matter? its when it was manufactured that counts - is that correct? also does it have to be a class 4 as the old card or can it be any class or is a certain class works better. Is there a code that indicates a new manufactured card. I have already brought 2 so I will see if they will let me return them. Thanks for the quick reply.
[HD7 General] dorianmuthig:
No, the code doesn't matter anymore as it only identifies the distribution region. Since the SanDisk/Toshiba fabrication plants are in Japan they usually get newly produced chips first. Some of the then new class 4 cards were marked as class 2 and sent to Europe, then fabrication temporarily switched to 8K NAND which was also used in SD cards (those cards aren't compatible) and everything was marked class 4, then as all NAND manufacturers realized the performance impact of 8K NAND in current commonly 4K flash controller applications they switched back to the "more expensive" 4K fabrication layouts and cards got to class 6 (still sold as class 4), recent cards are sold and marked as class 6, but since I never tested those, I cannot tell you if those work reliably, but they should.

In theory any "compatible" (e.g. fast enough) microSD or microSDHC (but not microSDXC) cards should work, if it is 4K NAND with 64K control block alignment (256K and 512K can also work, but 1024K usually doesn't).

Simply bench the card you got in a PC using CrystalDiskMark 3 and use the 4000MB setting and post what type of card you got plus the benchmark results in this thread (this is no definitive test to assess if a card will work, but you can eliminate cards that would be too slow).
[HD7 General] tonictone:
Ran the test on the 2 cards I brought and results are below,

This card was brought from Ebay serial SDSDQM-032G-B35N

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

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

Sequential Read : 16.879 MB/s

Sequential Write : 4.313 MB/s

Random Read 512KB : 16.466 MB/s

Random Write 512KB : 0.748 MB/s

Random Read 4KB (QD=1) : 2.124 MB/s [ 518.5 IOPS]

Random Write 4KB (QD=1) : 0.525 MB/s [ 128.2 IOPS]

Random Read 4KB (QD=32) : 1.899 MB/s [ 463.6 IOPS]

Random Write 4KB (QD=32) : 1.209 MB/s [ 295.2 IOPS]

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

Date : 2012/05/03 15:40:25

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

2nd card brought from MemoryC.com serial SQSQ-032G-BULK

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

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

Sequential Read : 17.201 MB/s

Sequential Write : 4.332 MB/s

Random Read 512KB : 17.009 MB/s

Random Write 512KB : 0.548 MB/s

Random Read 4KB (QD=1) : 2.412 MB/s [ 588.9 IOPS]

Random Write 4KB (QD=1) : 0.210 MB/s [ 51.2 IOPS]

Random Read 4KB (QD=32) : 2.371 MB/s [ 578.8 IOPS]

Random Write 4KB (QD=32) : 1.269 MB/s [ 309.9 IOPS]

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

Date : 2012/05/03 17:43:42

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

I have had a look would a class 10 card be best to go for as it has a higher read/write than a 2 or 4, also would the red and grey cards work they say they are SDHC1 is this compatible??
[HD7 General] dorianmuthig:
The first one could work, but since the 512K random writes aren't the same as the sequential writes the card likely has 1024K or 2048K control blocks which can cause performance problems with Windows Phone. The second card is not suitable, because the 4K random writes appear inconsistent, the card may work, but if it does, you will get poor application performance and a slow phone.
[HD7 General] tonictone:
Just to let you know - neither of these cards worked in the phone thay both came back with 0.0gb in the available memory.

Just ordered a class 10 card which I'm hoping is a newer version of the card as the read/write rates are higher - will post the crystal disk results when I get the card.
[HD7 General] djadry:
Hi everyone. I put in my HD7 a new SanDisk 16 gb MicroSD card.

I formatted it on startup and all worked fine... till I rebooted the phone. From that moment the phone says the card doesn't work...

What to do? :rolleyes:
[HD7 General] davalav:
Wait.. Let me get this right.

You stated at the start of the thread, that the Sandisk SDSDQM-032G-B35 class 2 OR class 4 work, as I am in the UK, the asain market card is irrelevent.

Now your saying only class 2 is compatable? I may be having difficulty understanding you, but I am a little confused.

Regards,
[HD7 General] dorianmuthig:
If a card works depends on parameters based on which it was manufactured. The model number is no longer relevant as SanDisk/Toshiba fabs have all moved on to newer processes, that are either better than all previous ones or completely incompatible.

Here's what doesn't work with first generation Windows Phones like the HTC HD7 or the Samsung Focus:

8KB sector NAND (this is used to save wafer space, because it reduces addressing circuitry)

256 sector (or higher) block NAND (blocks are the internal NAND address channels inside the flash chip control processor for simultaneous access and determine sequential R/W or NCQ write speeds)

SDXC cards (these will work in the future, there is some new HD7 and HD7S hardware batch now, that ships with a newer bootloader which supports them, it is likely this same newer SPL will be part of the HTC vendor update set, when Windows Phone 7.8 is released)

Class 10 and higher cards (High Speed Bus I/F)

UHS cards (UHS-I Bus I/F)

The only thing you can do, is buy and test a card (class 2,4 or 6), and return it if it doesn't work. You can exclude a lot of cards prematurely by running a benchmark like CrystalDiskMark 3.

On all second generation and newer phones, the internal flash is a soldered on SD/MMC/SDIO NAND chip and cannot be replaced.
[HD7 General] davalav:
Okay... Thanks.

I'll purchase a card today and see what works. Can you post the benching link up please so I can test my card.

Regards,
[HD7 General] dorianmuthig:
Sure, there you go: http://crystalmark.info/download/index-e.html#CrystalDiskMark

You will need to test with the 4000MB setting.
[HD7 General] onukomer:
i have sandisk 32gb micro sd card. and it has this code SDSDQM-032g-b35 does it support on hd7 ? sandisk 32gb class 4
[HD7 General] dorianmuthig:
Benchmark it with CrystalDiskMark 3.x and post the results (use the edit copy menu in the application).
[HD7 General] SynergiAios:
Thx for ur Guide, with this tiny help i was able to upgrade to 32gb class 4 x)
[HD7 General] hooutoo:
Password Protected

A buddy of mine has a password protect Hd7, his daughter's phone actually and since she got a new phone she can't remember the password to the HD7. I want to buy and upgrade to 32gb.

I believe the password that you type in to get into the phone is actually specific to the card and not to WP7. In other words if I just put a new correct model 32gb sdcard the phone will start up with a hard reset thereby formatting the new card and not require the password to get into the phone.

Is this correct?

Thanks in advance
[HD7 General] xdrc45:
upgrade my HTC HD7 running Deepshining rom to 32gb memory

Hi.. I'm running the Deepshining rom on my HTC HD7 and I'm wanting to upgrade my memory to the 32gb. If I do, Will this effect my custom rom in anyway? I believe the rom is stored on the OS internal 512 memory. Any suggestion or answers very much appreciated!
[HD7 General] hooutoo:
DS Rom will be there,it's flashed. Your apps @ data won"t!
[HD7 General] tonictone:
Finally got a card that works

After buying 5 cards finally got one that works in my HD7 asian version. It was a Sandisk Class 6 32gb micro card the ultra type (grey and red) serial number SDSDQY-032G-U46A, I will try and get a CrystalDisk rating done but my son's got the phone now so hard to get back for half hour.
[HD7 General] HR1979:
Could an SD Upgrade Leads to Roaming issues?

Hi,

I wonder if anyone can help.

I recently replaced the 16gb SD card in my unlocked HD7 with a 32gb class 4 scandisk card

- It worked perfectly for 4 days while I was in the UK

- Then I went on holiday to Morocco and the phone kept crashing and restarting

-Sometimes after restarting the I would get the memory card error page, but not every time (or even most times)

-Now I'm back in the UK the phone is working perfectly again

-I have used the phone to roam in the past (but not in Morocco) before I changed the SD card with no problems

-The odd thing is, if I put the phone in Airplane Mode there was no problem, I could then activate location, Bluetooth and Wi-Fi without a problem. But if I took it out of plane mode and allowed it to connect to the cell network it restarted again.

- I don't know if its relevant at all, but when I first turned the phone on in Morocco and it updated the time it was an hour out.

I suppose what I'm asking is if anyone knows if this is a problem caused because of the SD card changed or if it would have happened anyway.

Thanks in advance for any help anyone can offer.
[HD7 General] syedabdullah:
Upgraded to 64GB on my HTC HD7!

Excellent Tutorial.

I followed your instructions and installed a 64GB MicroSD XC card in my HTC HD7 and it's working perfectly.

Thank you so much for your help.