Honestly, I don't think it's a hardware issue, although that may seem like the most likely scenario.
Here's why I think it's a bug or compatibility issue:
If it's hardware, the SD card would actually unmount and the files, images, and apps would also be inaccessible. Also, I find it hard to believe that the card loses contact, but gains it right back.
My experience with my wife's phone when it was giving us trouble was that the card was accessible the entire time and it never unmounted; it would just pop up the dreaded notification every now and then. I think it's a bug or compatibility issue.
My wife's phone is going on 24 hours so far with no notifications after I swapped her card with mine. My phone is also notification free.
I would LUV to see this make its way to more online outlets, so we can get definitive answers from Samsung.
By the way, I chatted with them online yesterday and they gave me the: "Oh, this is the first we're hearing of it, but here's how to get into safe mode" speech.
S.
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