I just wanted to give everyone a heads up. I just bought a Samsung Focus this morning and love the device. The only issue i am having is that it will not detect my class 10 16GB microSD card. I have other 8GB cards and they detect fine but i cannot get the 16GB to work. I have tried the 16GB in other devices (laptop, HTC Hero) and it detects and works fine. So i dont know if it is a size issue or the fact that its a class 10 card but my windows phone will not detect that it is installed.
If anyone has had success with a similar card please let me know.
donky353 said:
I just wanted to give everyone a heads up. I just bought a Samsung Focus this morning and love the device. The only issue i am having is that it will not detect my class 10 16GB microSD card. I have other 8GB cards and they detect fine but i cannot get the 16GB to work. I have tried the 16GB in other devices (laptop, HTC Hero) and it detects and works fine. So i dont know if it is a size issue or the fact that its a class 10 card but my windows phone will not detect that it is installed.
If anyone has had success with a similar card please let me know.
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Are you doing a hard reset on the device after you put the card in?
I have been able to reproduce the same results with a Class 10 MicroSD from Kingston. It is not recognized by the phone with or without performing a hard reset. A class 4 32gb card was recognized with no issues.
Hmmm, class 4 works but not 10??? Class 10 == too fast for Wp7
One more data point. I am also experiencing an issue with the Kingston 16GB class 10 microSD card in a Samsung Focus. Slightly different issue though -- only 8 of the 16GB are recognized.
As you may have seen, AT&T employees are now warning customers to not install microSD cards until MSFT issues a patch. When I bought my Focus this morning, the AT&T salesman brought his manager out to tell me about the problem.
CHANGED: The Transcend 16GB Class 6 card does not work per se. Will see it all 16GB after hard reset, then after turning phone off then on again only sees 8GB of the card.
My A-Data 16GB class 6 card works.
I posted earlier that my Kingston 16GB class 10 card didn't work in the Foucs. I just bought a Sandisk 16GB class 2 microSDHC card, which worked fine. From what I've seen there is no authoritative way to predict which cards will work. However, I have not seen any reports of Sandisk cards failing.
Class 10 cards will not work til update.
rosswesleyporter said:
One more data point. I am also experiencing an issue with the Kingston 16GB class 10 microSD card in a Samsung Focus. Slightly different issue though -- only 8 of the 16GB are recognized.
As you may have seen, AT&T employees are now warning customers to not install microSD cards until MSFT issues a patch. When I bought my Focus this morning, the AT&T salesman brought his manager out to tell me about the problem.
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it is the class not brand class 10 cards will not work til the update..
Another data point -- I saw instability even with a card that appeared to be working. I first posted that my Kingston 16GB class 10 card didn't work (only 8GB recognized). I then posted that my Sandisk class 2 16GB card worked. However over the next two days, I experienced surprising instability e.g. the phone rebooting itself several times per day. For the last two days I have been running without a microSD card and the spontaneous reboots have gone away. Other people may be having better experiences with their cards. But for the moment, I'll live with less sync'ed music to get better stability. If the spontaneous reboots come back, I'll post again.
rosswesleyporter said:
Another data point -- I saw instability even with a card that appeared to be working. I first posted that my Kingston 16GB class 10 card didn't work (only 8GB recognized). I then posted that my Sandisk class 2 16GB card worked. However over the next two days, I experienced surprising instability e.g. the phone rebooting itself several times per day. For the last two days I have been running without a microSD card and the spontaneous reboots have gone away. Other people may be having better experiences with their cards. But for the moment, I'll live with less sync'ed music to get better stability. If the spontaneous reboots come back, I'll post again.
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You might want to try this card tester on your cards as they mey be bad...
It seems most cards class 6 and above don't work and class 4 is the most reliable. Ho hum!
For what its worth I've been using a Kingston 32GB Micro SDHC Flash Card Model SDC4/32GBSP since Monday and having no problems whatsoever.
Class and size has nothing to do eith it. Google for more info.
Sent from my SGH-T959 using XDA App
The reason Class 10 cards don't work and Class 2 cards do is because of the random read/write speeds. Class 10 cards promise fast SUSTAINED write speed but at the expense of random read/write. Windows phone 7 relies mainly on random read/write speeds to function smoothly. Fortunately, this means that Class 2 cards work very well! I would consider this to be a good thing however because Class 2 cards are cheaper!
Adding to this old dead thread, but was hoping to know if anybody knew if Microsoft fixed this issue yet. I just ordered an A-Data 16GB Class 10 MicroSD recently..
From a quick search, it seems it hasn't though?
Yeah, I don't think anyone has really had an issue with a card since nodo. As stated in this thread however, many people have (in the past at least) had better luck with class 2 than any other class. I've been using the sd card below for a couple of months with no issue with about 30gb of music loaded on it.
amazon [dot] com/gp/product/B003WGJYCY
(stupid rule won't let me post outside links)
What speeds should I be getting?
I bought a sandisk 16gb off Ebay. Figured it was safe being "sandisk" and all.
I am getting about:
6mb/s write
19mb/s read
Saw someone pose they got 3 write and 130 read...
can this also be ROM related? They were on magnolia I am on CM7.
It sounds like a reasonable number, I have an older SD card that writes at about 3.5mB/s.
Sounds like a standard Class 2 memory card. Check your uSD card, does it have a little number inside of a circle? If it doesn't it's more than likely a class 2 card.
They categorize most flash-based memory cards by "class" now, the higher the class, the faster the read/write speeds. They have them in multiples of 2's. I have a class 6 8GB microSD from Transcend that I use for my Nook Color and I get on average around 11.5MB/s write speed.
Definitely atleast a class 4. Class 4 is 4Mb/s read speed. The write speed is irrelevant.
I have a class 4 Sandisk as well and it reads at just over 6Mb/s. Not sure on write speed. It was definitely faster than 19Mb/s though. Did you test it using h2test to make sure its a legit card?
My 16 gb PNY class 2 card was getting too small so I decided it was time to upgrade. As far as I could tell the Vibrant doesn't actually support UHS cards, but since I'm only a couple months away I just got one anyway.
I tested the cards with CrystalDiskMark in two ways, via USB in the phone, and in my laptop with an older SD2.0 card reader. The only Android app I could find that did anything other than sequential reads was AndroBench, and I couldn't get it to point at the external card. I'm on ICS, not sure if that was complicating the issue. If anyone knows of an app that does random r/w operations, let me know.
Sorry for the PNY/AData confusion in the screenshots, the UHS-1 card is AData and the Class 2 card is PNY.
Hi all,
I've currently been using a 16GB Sandisk Class 4 MicroSD in my Note, and that's filling up, and I'm planning to switch to a 32GB card.
BUT, there's 2 I'm stuck against choosing between.
This one is a 32GB Class 4 card by SanDisk:
http://www.play.com/Mobiles/Mobile/...0&searchtype=allproducts&ob=4&urlrefer=search
But this one is a 32GB Class 10 card by Play.com:
http://www.play.com/Mobiles/Mobile/4-/21619964/0/Play-com-32GB-Micro-SD-SDHC-Memory-Card-Class-10/ListingDetails.html?searchtype=allproducts&searchSource=1&searchfilters=ae63{Play.com}+&urlrefer=search
Which should I go for?
If you want more speed: Class 10
If you want more money: Class 4
I used a 32gb class 10 previously and now the 64gb SanDisk class 6.
While I did like the speed and filling up the new one took it's time, I do prefer volume over speed.
The 64gb gives me so few worries over space, and once my "permanent" media was on it I am in gb-heaven.
But then, to me the space was the priority.
If you have the need for speed, a fast 32 may fit you better, or you can wait until 64 gets fast.
Also keep in mind that you can buy a fast 32, a 2 dollar usb otg cable on Amazon and a big thumb drive for less than the price of a 64. But that is a clunky solution.
I prefer the big card.
ShahinTehShiz said:
Hi all,
I've currently been using a 16GB Sandisk Class 4 MicroSD in my Note, and that's filling up, and I'm planning to switch to a 32GB card.
BUT, there's 2 I'm stuck against choosing between.
This one is a 32GB Class 4 card by SanDisk:
http://www.play.com/Mobiles/Mobile/...0&searchtype=allproducts&ob=4&urlrefer=search
But this one is a 32GB Class 10 card by Play.com:
http://www.play.com/Mobiles/Mobile/4-/21619964/0/Play-com-32GB-Micro-SD-SDHC-Memory-Card-Class-10/ListingDetails.html?searchtype=allproducts&searchSource=1&searchfilters=ae63{Play.com}+&urlrefer=search
Which should I go for?
Click to expand...
Click to collapse
Why dont yo go for a 32 GB Sandisk Ultra (Class 6) Memory card. It has a good performance.
If in any case you need to buy a class 10 card go for transcend/kingston or even Samsung
i suggest you to buy patriot class 10
Let me say I came from the OG EVO. I bought a 32GB class 10 sdhc card and with that phone write speeds were horrendous! I barely got 7MB/s.. read however was in the low 20MB/s range. I reformatted that same card for use in my new SGS3 16GB. I am now getting 9-10MB/s write and about the same read. Finally a phone that actually makes use of these faster sd cards!