When doing a File/Folder backup, if you insert a rewritable disc that already has a file backup on it, Reflect just writes the new backup to any remaining space on the disc. If you insert a rewritable disc that Reflect has already written the disc full of contents to, Reflect says there is no space on the disc. There should be an option for the user to erase the disc and reuse it.
As it is now, I have to use the Erase option in ImgBurn to erase rewritable discs if I want to reuse discs that Reflect has written a file backup to.