I just got hold of a similar 16GB class 10 GREY AND RED SanDisk memory card design. Thickness comparing with the 32gb SanDisk is actually the same., therefore theoretically it will have error problem too. I will keep u guys updated on this.
I have 3 different 32GB MicroSD cards -- Kingston Class 4, Patriot Class 4, and SanDisk UHS Class 10 (red/grey). I also have the Note 2 and my wife has the S3.
The problem seems to be a combination of Samsung's MicroSD slot and SanDisk's super thin MicroSD cards. Both the Patriot and Kingston 32GB MicroSD cards are noticeably thicker (almost 2x) and both fit more firmly in my Note 2' and S3's MicroSD slots.
I also have the same problem when using only the SanDisk MicroSD card in my multi-slot card reader. I get card not inserted errors as well as cyclical redundancy errors, misc write errors, etc. This card reader was not cheap and I paid good money for it because I use it for semi-pro digital photography -- I cannot have a card reader messing up my photos. I purchased my SanDisk MicrosSD card with a full sized SD adapter (just because that's the one that was the best deal). Guess what -- the SanDisk MicroSD card formats, reads, and writes perfectly fine when using the full sized SD adapter in the same card reader. Neither the Patriot nor Kingston MicroSD cards will fit in the SanDisk full-sized SD adapter, so clearly this SD adapter's slot is specifically designed for the significantly thinner SanDisk MicroSD cards.
So, I think the problem is that SanDisk made their newer MicroSD cards too thin, so they're not making constant, proper contact inside Samsung's card slots (and my card reader). My Acer A500 tablet has a better designed card slot so (at least so far) the SanDisk MicroSD card isn't giving me any problems in it. Likewise, my Patriot Class 4 card that's now in my Note 2 is not exhibiting any of these problems because it's a thicker card so my Note 2 (so far) seems happier with it.
Anyway, that's my current theory. I wonder if there are any other memory manufacturers who thinning up their card designs? So far, it's just been SanDisk that I've encountered this. Seems like most of the people here on this thread are also having problems with just the SanDisk cards.
It could actually be something internal to the manufacturing on the card. I know that both SanDisk and Samsung actually make their own cards, unlike say Kingston and Patriot, etc. The card that I replaced my SanDisk card with is a Patriot 32GB Class 4, but I believe the internals are actually manufactured by Toshiba. Maybe Samsung hardware and SanDisk memory just isn't playing nicely...?
One thing that seems to be glaringly obvious is that almost all the problems seem to be with SanDisk 32GB UHS-1 cards. Could just be a coincidence that it's the thinnest card I own.
Does anyone know if there's an Android app (or even a PC app) that will show the actual manufacturer of the card? I know SD Tools used to do this, but on my newer phone and tablet it only gives the card info on the internal memory (even when I change the path to the external SD card).
By default once u open the SD Tools app, I thought it is already reflecting the Sd type( example SD16G) and all relevant info; For example IMEI at main page? It's only when you change the path directory to /mnt/extSdcard, then the information of the card will be gone. This is where i feel kinda of weird to know that no information on the changed path directory (SD card) when I am about to perform a WRITE/READ check.
What's the monitoring app that everyone is using? I've just been watching for the previous symptoms (message when I wake up the phone).
At least on my devices (other than my EVO 4G), the SD Tools app defaults to displaying info for the internal memory -- not the ext SD card. For example, it tells me that my my "SD card" is only 12GB (instead of 32GB) and says it's a Samsung, even when I have the SanDisk card in.
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