Sounds like something is wrong with your sd card. I would back it up then format it on the phone, then put just the nandroid folder back on and try again
So I'm formatting the card in my phone but it just asks me twice and then nothing. Is that whats supposed to happen? No confirmation message or anything?
EDIT: seems to have worked when attempting a backup with the SD card empty. I am going to try to add the files again and see what happens from there.
Seems to have worked ok. I'll keep you posted. I just transferred the one backup I was interested in and deleted the old nandroid folder, just in case. Runs fine now, I don't forsee any problems in the future. Thanks again for your help.