OK. I am on Grdlocks Vanilla ROM (which I love). I have noticed that available space on my SD card has decreased dramatically. I have a couple questions. Can I complete a NANDROID backup at anytime? Or just when I flash a new ROM? How would I use a NANDROID backup if I actually needed one? Can I delete old ones off my SD card? I have two and they are taking up a lot of space. Do I delete the BDS folder when I delete these? Appreciate any help.