yashsingh1/xdaforums huggingface dataset:
[Focus General] swake457:
http://www.amazon.com/gp/product/B001L1H0SC/ref=oss_product

I'm currently rolling with this microSD card that I installed just a few days after the Focus came out, during the initial phase of the whole microSD card controversy was boiling up. I pulled the trigger hoping for the best and so far it's been working just fine. At first I didn't have much more than a few gig of MP3's and a handful of apps, but now I'm just a bit over 12GB. I've had one sudden soft-reset occur, but I really have no way to tell what caused that. When it happened I was at the home screen and I think I had clicked on Outlook when it then did the soft-reset. No data loss though.
[Focus General] blahism:
is there anyway we can sum this stuff up?

I've had to pull out the microsd card on both my phones.. i thought they worked but one of my phones reset so bad i had to RMA it - even a hard reset couldn't get it out of the 15mb mode. The other one hard reset ok but we're running both with no sd card and i'm desperate for more space since i do a lot of pod cast listening on mine and 8gb is fillig up quick
[Focus General] blahism:
i agree. i guess its time for me to call samsung and open a ticket.

i bought my phone on launch before everyone backtracked on its ability to be upgraded :(
[Focus General] jeffgeno:
To sum up, SanDisk 8GB cards work. I've been using mine for a month and haven't had a single random reboot. Anything bigger than that is a crapshoot. They look like they work fine until you load them up with more than 8GB of data and then the reboots and temporary data loss show up. You might be one of the lucky ones that get a 16 or 32GB card to work, but I wouldn't chance it for now.
[Focus General] FL5:
From the blog posts I've seen, when people disassemble units to get at their hidden cards, they tend to be SanDisk class 4 cards, so if you wanted to walk the safer side of the thin line, that would probably be the way to do it. I've got a SanDisk 16c4 in mine, and admittedly haven't put enough on the phone to even ensure that I'm even using the card, but it hasn't given me problems. For now, it seems that no 32gig card is reliably working consistently, and should be avoided unless you really enjoy gambling on bad odds.
[Focus General] SuperSport:
From what I've noticed, you will NOT have any trouble until you cross over the 8GB threshold, no matter what card you use. Another observation is that the problem happens much more frequently when the battery is in it's last 10%. The screen becomes unresponsive and then the restarts begin. Weee...

Update on my experience with Samsung. I have a Confirmed Windows Phone 7 Compatible 16GB card on it's way to me now. I will post all the info/specs I can find about it as soon as it arrives.

Speaking about SD Cards. How would you like to be able to access the memory in your phone, including the SD Card, using Windows File Explorer? I've just done this registry hack on my Windows 7 x64 and it works like a charm. Now I can drag and drop info back and forth from the phone to my PC. :D

http://www.mobiletechworld.com/2010/11/18/use-your-windows-phone-7-device-as-a-portable-usb-drive/ It only allows you to see the data folders, so you SHOULD be safe from destroying the OS. :p This hack leaves Zune able to sync still.

PS: I kept not seeing my data until I read that you need to close Zune after connecting. As soon as I closed it, the folders showed up! :cool: Remember, be sure Explorer AND Zune are closed when connecting. Then, either use Zune, or close Zune and open Explorer.
[Focus General] FL5:
Dude! Seriously, run CrystalDiskMark on that card before you lock it into your phone! I want to see what kind of read/write speeds qualify as meeting the requirements.
[Focus General] SuperSport:
Most definately! :D
[Focus General] djca:
I experienced the same frequent resets with a low battery. I then charged my phone (with a Micro Center 16GB microSD) overnight, and left Netflix loaded (but not playing a movie) under the lock screen. In the morning I checked my phone and Netflix was still under the lock screen, so I guess it didn't restart.

I experienced another random 15MB reset today even with >50% battery. Doing About->Reset again restored the apps and full storage.

If I decide to remove the card, and reformat my Focus, can I try to use the card again later on in the Focus if Samsung/MS somehow finds a software fix?
[Focus General] mfaist:
Sandisk 16/2

Bought a Sandisk 16GB Class2 card off of Amazon. CrystalDiskMark results below. Going to hold off on putting it in my phone until I see how it stacks up to the results for SuperSports certified card.

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

CrystalDiskMark 3.0 x64 (C) 2007-2010 hiyohiyo

Crystal Dew World :

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

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

Sequential Read : 11.965 MB/s

Sequential Write : 6.196 MB/s

Random Read 512KB : 11.822 MB/s

Random Write 512KB : 0.650 MB/s

Random Read 4KB (QD=1) : 3.231 MB/s [ 788.8 IOPS]

Random Write 4KB (QD=1) : 1.463 MB/s [ 357.1 IOPS]

Random Read 4KB (QD=32) : 2.899 MB/s [ 707.8 IOPS]

Random Write 4KB (QD=32) : 0.137 MB/s [ 33.4 IOPS]

Test : 1000 MB [J: 0.0% (0.0/14.8 GB)] (x5)

Date : 2010/12/15 15:20:46

OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x64)
[Focus General] denizen08:
On the issue of power

Out of curiosity I've been observing the battery state and total voltage consumed (VBATT_MV) by my Samsung Focus during runtime. During the recording of this data I go into Samsung's Diagnostic Panel, so I don't actually have data from when the phone is being used for apps like Zune player or browser:

Average voltage consumed when the battery is at capacity>70% is 4 V to 4.4 V.

Average voltage consumed when the battery capacity drops below 60% is 3.5 V to 4 V.

I believe what I'm seeing here is the power saving subsystem of the phone. I don't know whether its hardware- or software-implemented, but it may be an issue as have been pointed out by some users. I come to this hypothesis as well because looking at the results of many of the uSD Cards submitted it seems that random access times are comparable to acceptable cards already in use.

Now, I don't presume to be an expert but this is what my instinct tells me. As for the instability of the 32 GB uSD Cards it maybe attributed to the manner by which the storage units are packed which will definitely be so much more different to a 16 GB uSD Card. I'll have to research some more to actually have merit on this topic so don't take my word just yet.
[Focus General] SuperSport:
I've been able to use the card later after I've removed it and reformatted the phone without one. The card of course needs to be reformatted, but it works just like it did before.

PS: Smart way of checking for random reboots at night.
[Focus General] hapa papa:
I have been checking Sandisk's compatibility tool on their website and for the last few weeks it had a link to Focus compatible cards but there were none listed. I just checked their site and there is no longer a link for the Focus at all.

I wonder if this means they will be updating their site to show the officially supported cards soon???
[Focus General] wm.andrew.wilson:
Just bought a Kingston class 4 32 GB and so far it is working great. I am pushing it hard and nothing is going wrong...I am syncing it with all of my music (it will be 90% full) and will update when it is done if there are any issues or successes.

Bought it here:

http://www.newegg.ca/Product/Product.aspx?Item=N82E16820139394

AT&T Branded Focus running unlocked on Bell Canada

OS Version: 7.0.7004.0
[Focus General] wm.andrew.wilson:
I am getting the slow sync issue...the device performs wonderfully when not syncing, but it takes a long time to sync. I have noticed something not noted on this thread yet though...

This might be software related after all, hear me out on my theory. When zune begins to sync more slowly, if you stop and then immediately start the sync again, it will race through anywhere from 20-100 songs before deciding to stick on one song and take minutes on end to sync it. This makes me think that somehow, the initial transfer is going into some sort of fast cache (NAND storage or RAM possibly?) and then is being written to the memory card from the phone after that.
[Focus General] FishFaceMcGee:
I would agree if it weren't for the fact that it only affects Kingston 32GB Class 4 cards.
[Focus General] vedichymn:
How the hell did you manage that?
[Focus General] tripntx:
Post your crystaldiskmark numbers once you get it.
[Focus General] tripntx:
Subscribed to some podcast's last night, they wireless synced to phone while I slept. Will continue until card has only 2 GB free space remaining. Current Patriot storage is:

Total 22.12 GB

Available 10.25 GB

If I ever find a reliable way to reformat this card at home, then I'll remove it and run it on crystaldiskmark so the results can be posted here. Most everything I've downloaded I really do not want on my phone (just downloading to see if it will fail), so I have no issue with wiping it clean. Live and FB sign-in sets up everything I need with the exception of digital photos.
[Focus General] SuperSport:
It was not easy, and I'll actually believe it when it arrives... ;)

Most definately, along with Make, Model, Class, etc... Anything I can find on it. Photos for sure.
[Focus General] Quicksilver4648:
Okay, I hate to be THAT guy, but I have a Samsung Focus and I am looking to purchase a 16GB memory card because the stock 8GB just doesn't cut it. However, I must ask, what is the general consensus on the best 16GB card?

The OP hasn't been updated it quite a number of days and there are over 40 pages so I don't feel like reading though them all. Could I choose any card that has been said to work or is their a specific model that rises up above the rest?
[Focus General] tripntx:
IMHO, seems a lot SanDisk C4, several Kingston C4, and a few of us are successfully using Patriot C4, and a few are successfully using a Microcenter branded C4.

Make sure you do not purchase from third party Amazon or cheapest on eBay because it is very likely you will receive counterfeit which will not work in these phones.
[Focus General] FL5:
Lol, I've basically purchased all of my cards from third party Amazon or eBay sellers. :p

As a matter of fact, the SanDisk 16c4 that I benchmarked and have in my Focus right now came from a rather speedy ebayer in Florida.

That being said, any time you purchase flash memory it is a crap shoot. Counterfeits have been found everywhere. However, online reviews, seller rankings, and feedback are great. Read up on return policies, too. Pays to be an informed consumer.

But as for your question, Sandisk is usually a reliable brand. Get a class 4 card. Stay away from the 32gig cards for now.
[Focus General] Quicksilver4648:
Thanks for the replies.
[Focus General] DKDogz54:
Had the phone for the pass 12 hours with the Patriot class 4 card mentioned earlier. Works fairly well. 22GB total memory, with 7GB remaining; so im definitely using the card's memory now. I do see lag from time to time and it won't sync any more. Other than that, it works pretty well.
[Focus General] daniel_leavitt2000:
Update on the Kingston C4 16GB card... all is well at 8GB free. I did run into a significant slow down in syncing when plugged in or via wifi, however the phone is stable. This is only an issue when downloading several hundred songs at a time, NOT on small transfers like pictures. Easy solution is to set your auto sync in zune for wifi, then leave your computer on overnight while the phone is charging.
[Focus General] SuperSport:
Samsung Approved Card Arrived

Ok, I just got my card from Samsung today. I was told I was going to receive a Windows Phone 7 certified card in the mail. Well, what I got was a Samsung Card. It does NOT say Windows Phone 7 Certified on the card. See Images.

Description:

Samsung

16GB

MicroSDHC

Class 2

On Back:

CE

MMB3R 16GUACA-GE

I Y073F000 030

Made in TAIWAN

I called to confirm this is in fact Phone 7 Certified, and they said YES, Definitely. I have not inserted it into my phone yet, since I wanted to Crystal Disk Mark it first.

I'll update THIS post with results when it's finished.

PS: These photos taken with Macro Mode on the Samsung Focus. :D Try reading the words on the back of your MicroSD and you will see how impressive this is. ;)

Crystal Disk Mark:

It's really strange. The specs are not that good. I wonder why this card is "Certified" and some of the faster cards are not. Seems wierd.

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

CrystalDiskMark 3.0 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 : 12.873 MB/s

Sequential Write : 6.597 MB/s

Random Read 512KB : 11.896 MB/s

Random Write 512KB : 0.666 MB/s

Random Read 4KB (QD=1) : 2.701 MB/s [ 659.4 IOPS]

Random Write 4KB (QD=1) : 0.029 MB/s [ 7.1 IOPS]

Random Read 4KB (QD=32) : 2.525 MB/s [ 616.6 IOPS]

Random Write 4KB (QD=32) : 0.028 MB/s [ 6.7 IOPS]

Test : 1000 MB [P: 0.0% (0.0/14.7 GB)] (x5)

Date : 2010/12/19 1:08:02

OS : Windows 7 SP1, v.721 [6.1 Build 7601] (x64)
[Focus General] ITDRAGON:
Hi everyone I recieved my Sandisk 32Gb today and here are my test results. :) Looks pretty good doesn't it?

Edit: holy snappers.. it's a 32 Gb Class 4?? got it on Amazon for $84.00

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

CrystalDiskMark 3.0 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 : 9.733 MB/s

Sequential Write : 5.222 MB/s

Random Read 512KB : 9.495 MB/s

Random Write 512KB : 4.911 MB/s

Random Read 4KB (QD=1) : 1.165 MB/s [ 284.5 IOPS]

Random Write 4KB (QD=1) : 0.487 MB/s [ 119.0 IOPS]

Random Read 4KB (QD=32) : 0.857 MB/s [ 209.2 IOPS]

Random Write 4KB (QD=32) : 0.160 MB/s [ 39.2 IOPS]

Test : 1000 MB [E: 0.0% (0.0/29.7 GB)] (x5)

Date : 2010/12/19 7:02:02

OS : Windows 7 Ultimate Edition [6.1 Build 7600] (x64)
[Focus General] wm.andrew.wilson:
Now the question is....where can the rest of us buy these seemingly non-existent cards? (In reference to the official 16 GB Samsung branded card)
[Focus General] djca:
Your Random Write numbers are actually the worst of what I've seen posted on this thread. Your Random Read numbers are good but not as fast as the Sandisk 16GB C2 posted before.
[Focus General] FishFaceMcGee:
I wouldn't be jumping to find out how to get one of these Samsung cards until we get the go-ahead by SuperSport saying that his phone is still stable after filling it up.
[Focus General] lasttruck:
I wonder who makes this Samsung card. Any ideas?
[Focus General] FishFaceMcGee:
Maybe a stretch here, but Samsung? I mean, they do make NAND memory, so it isn't too crazy to think that they're actually making their own microSD. Granted, apparently Kingston outsources their microSDs, so who knows.
[Focus General] SuperSport:
Yes, it really surprised me too. I even ran it on two computers and the results were very close.

I still haven't installed it due to needing it in my HD2 for a little bit and once installed in Focus.... :(
[Focus General] SuperSport:
I'm beginning to believe my low write numbers are due to the USB Adapter I am using. Here is the output from a 4GB PNY OPTIMA Class 4 HD Card:

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

CrystalDiskMark 3.0 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 : 14.759 MB/s

Sequential Write : 6.875 MB/s

Random Read 512KB : 13.370 MB/s

Random Write 512KB : 1.605 MB/s

Random Read 4KB (QD=1) : 2.873 MB/s [ 701.4 IOPS]

Random Write 4KB (QD=1) : 0.021 MB/s [ 5.1 IOPS]

Random Read 4KB (QD=32) : 3.547 MB/s [ 865.9 IOPS]

Random Write 4KB (QD=32) : 0.018 MB/s [ 4.4 IOPS]

Test : 1000 MB [P: 45.6% (1718.7/3768.0 MB)] (x5)

Date : 2010/12/19 11:18:43

OS : Windows 7 SP1, v.721 [6.1 Build 7601] (x64)

Similar LOW Random Write speeds... Going to try it another way and see what I get.

Confirmed. I get MUCH different results on another computer using a different USB adapter. This means the Crystal Mark data is only good on the same computer and same USB Reader/Adapter to compare two cards side by side. Is this a safe assumption?
[Focus General] SuperSport:
Just installed the Suposedly "Windows Phone 7 Compatible" 16GB Card. Syncing MUCH data now and crossing fingers... ;)
[Focus General] lasttruck:
Good luck.
[Focus General] jaraya13:
Please keep us updated!
[Focus General] SuperSport:
Ok, it's filled with 2.55 GB left. Total Storage listed is 21.92 GB. I'll stress test it for the next couple days and report back. At this moment, it seems quite fast, which is strange considering how full it is. No lag on the lock screen, even with WiFi & WiFi Sync turned on. Now, I'm doing some MAJOR Sync adjustments. Adding both Transformers Movies and removing a bunch of music, Adding more apps and removing others. Phone still responsive so far even while all this is going on. Running between 800MB and 4GB during all this.

Observation: My battery is basically full now, so maybe when it gets lower I will experience a change.
[Focus General] HoHoHoHo:
Could you give us a link to the amazon.com 32GB sandisk card? There are many similar items on amazon and it's hard to figure which one. thanks.
[Focus General] tuffluck:
2 weeks today with the microcenter 16gb card, still going strong. i have nearly 11gb of storage being used.

i would seriously tell everyone that lives near a microcenter to give this card a shot. not only will you have it today and it's easy to return, it has great success stories and is the cheapest 16gb card you're probably going to find anywhere. i paid $29 with mine that includes tax.
[Focus General] ITDRAGON:
I can finally post links :D

http://www.amazon.com/gp/product/B003OA8T92/ref=oss_product
[Focus General] leo5111:
is that a stable 32 gig card with the focus?
[Focus General] FishFaceMcGee:
Given my experience, no.
[Focus General] OGCF:
It's great to hear their cards are working pretty well so I'd definitely consider going there for my storage. I love their stores and I'm even considering going to work for them by next year :)

So you haven't had ANY issues?! Not even any random shut offs?
[Focus General] HoHoHoHo:
I know djca has this microcenter 16GB C2 card and had frequent reset problems. tuffluck has the same card and has no problems for 2 weeks. What is the difference? I read from another thread that formatting the microSD card in the phone twice (2 times) seem to work better. Does that make sense?

SuperSport, Where can we order the Samsung 16GB microSD card?
[Focus General] mfaist:
I know it's a crap shoot, but I just bought a Samsung 16GB card off of ebay. I asked the seller for the information off of the back of the card. The reply I recieved was MM83R16GUACA-GE. Matches the information from SuperSport except for the 8 instead of B, but I figured that was because it's really hard to read. It's only $25, so I figured what the heck I would take a chance.
[Focus General] HoHoHoHo:
Samsung also makes a 32GB microSDHC card. Do a search on Google and you will find it. But don't know where to get one yet.
[Focus General] SuperSport:
Wow, I'm impressed. I tried really hard to find it and was unable. Google, Shopper, Buy.com, Ebay, Etc...

Here's the deal. I got the card direct from Samsung Support. It was sort of a learning experience for them and me. They took my old HD2 card to run tests on it and I got their card as their way of saying thank you for explaining the issues we were having. It was a LONG drawn out process. I went from tech to tech and finally ended up with an ECR that was going to help the best she could.

So far, it's running flawlessly. Even better than the Sandisk 8GB Class 4 that I just pulled out. I ran it HARD yesterday and last night. (GPS, Music, Movies, Internet, Email, Push Email and Apps, Games, texting, etc...) I ran it until the battery died and it keep going smooth till the end. Zero Restarts, and Zero Lag. Recharged it and woke up to a smooth phone still. NO lag when unlocking, which was a problem even with the previous 8GB Card. It's got 6GB Free Space atm. I am aware that sometimes people have trouble after a period of time, so I'm still monitoring it, but so far, perfect!

About the B-8 issue on the part #. Yes, I thought the same thing until I blew up the photo. Small, it does look like an 8. $25 seems like a Great Price too! Hopefully my card will continue to perform well, and that card will soon become a hot commodity.

I don't know why, because it's only Class 2, but it seems to integrate well with the Focus. Funny thing. I installed it into my HD2 before formatting in the Focus and it ran horribly in the HD2. Very slow and laggy.

I'm NOT recommending everyone go out and buy this card, because it's only been a day so far, but if you are so inclined to do so, here is a list of ebay listings for Samsung 16GB Cards. Of course, it would be good to veryify what's printed on the back before purchasing also. Don't tell them what you are looking for, but rather, let them read it to you so you know they are looking at it.And, keep in mind the possibility of Counterfits out of China. Especially, when Confirmed Compatible cards become known.

http://shop.ebay.com/i.html?rt=nc&L..._sc=1&_sop=15&_sticky=1&_trksid=p3286.c0.m301 Note: Very few of these are actually Samsung, so look carefully.
[Focus General] FishFaceMcGee:
Really cool. Glad to hear it's working. Hopefully the full list comes out soon and there are cards available in stores (therefore a bit easier to trust and more accountability).
[Focus General] SuperSport:
Most definately.
[Focus General] HoHoHoHo:
SuperSport & mfaist, thanks for your info on the Samsung 16GB C2 card. It is impressive that there is no lag or delay with the operation of the phone. I had a 4GB C6 card from my old phone and after formatting in the Focus, I immediately noticed the slowness of the phone. The Class rating is not relevant.

mfaist, once you received your card, could you please post the CrystalDiskMark info? Also if this works out, could you post the name of the eBay seller so we don't get the wrong card? Thanks.
[Focus General] SuperSport:
Many of you have likely already read this, but it's good information and explains why the Faster Cards are not necessarily faster in this phone.

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.

Shared from Engadget.