Seems like we are back to square one since its not the thickness. Personally I don't feel it's the thickness of the card problem.
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 don't think it was ever the thickness being a problem.

I bought mine back in October 2012 and it worked great only until this month. Then it started having problems.

I encountered the same issue and replaced with a samsung C10 32G USH-1

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I have encountered the same issue just after one month of using sandisk 32G C10 Ultra USH-1. Now, I replace it with a Samsung 32G C10 ush-1. I will keep testing it and reporting in this thread.

Originally Posted by internetpilot

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.

Just checking back in to this thread almost a week after I went with my "solution" and I still have zero problems. Proceeding with my fingers crossed, though, because it took almost two months for the problem to first show with the SanDisk card.

Re: SD Card Unexpectedly Removed

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I have a similar issue with the same sandisk 32gb card. Although it has happened after I have upgraded to jb (xxlsd). I will try to recover my data and add a piece of paper or tape to the card.

Sent from my GT-I9100 using xda premium

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).

Originally Posted by internetpilot

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).

Are you using any monitoring app to detect for bad removal for your Patriot 32GB class 4 ad card? As for now, my loaned 16GB class 10 red/grey is still running fine with no bad removal detected.

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.

Originally Posted by frost_theone

Are you using any monitoring app to detect for bad removal for your Patriot 32GB class 4 ad card? As for now, my loaned 16GB class 10 red/grey is still running fine with no bad removal detected.

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).

Originally Posted by frost_theone

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.

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.

Re: SD Card Unexpectedly Removed

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I have a pny 32 gig sd hc and the same problems started right away same day I put it in the phone. Now I can't get the phone to even recognize that there is a card in it.

Sent from my SGH-T889 using xda premium

Originally Posted by internetpilot

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.

I am using this app - SD Monitor.
--> play.google.com/store/apps/details?id=com.sdcardmonitor&feature=search_result #?t=W251bGwsMSwxLDEsImNvbS5zZGNhcmRtb25pdG9yIl0

To be honest, the error sometimes pop up even in sleep mode and I was totally unaware of it till I open that app to view the no. of bad removal. U could just be lucky that the error didn't appear upon u wake up your phone. This app is really useful. Trust me, u will be surprised with no. of removal detected while phone is hibernating. I will try to attach some screenshots of the error soon (if possible because I am not allowed to attach pictures as new user)

Mine shows the the name and OEM ID but I have no idea about the abbreviation. As long as the app (SD Tools) allows me to perform a read/write test, I am fine. FYI, below is the data of the 32GB incompatible Sandisk card info;
Name: SU32G
OEM Id : SD
Mid: 0x000003
Date: 10/2012
Serial : 0x1cd69d12
Firmware: 0x0
Hardware: 0x8

Cheers