I'm having this issue and I can't seem to give with the solution.

My eMMC is formated as ext3 on /home and ext4 on MyDocs. I have a Kingston microSD card, 16 Gb, 10 class. That card is formated as FAT32, but I can't get my Windows 7 PC to read it.
First, it asked me to format it. Since I've done it previously with gparted, I decided to try with the Windows built-in format tool. And it worked! (with the card emptied) At least until I copied back the files I had from my linux PC. Then again, it didn't even show the disk this time.

What am I missing here? Do you have any problems of this nature?