I wanted to put Wikipedia on my laptop, so I got a 16GB SD card to hold it...but it was formatted as FAT32, and can't hold the 12GB image, so I tried to reformat it to NTFS...and it's now dead as a doornail. The OS can't see it, or can't access it, anyway. So I can't format it back to FAT32, either.
I tried to rescue it with Ubuntu, but it can't see it either.
Any ideas?