I don't know about a card reader, but I do have a sort of converter/holder that fits in a slot on the front of the PC, as Hadron kindly noted. I used that combo with the other SD card, but that was already formatted and had numerous pictures and videos. If I "convert" it to fit in the slot, would I then be able to format it as FAT32? Would it be safe to power off the phone, remove the cover, take out the card, and do that? If I reboot the phone, it shows the "corrupt" message and offers to format, but it instantly reads 20% and doesn't change after that, except to disappear.