No, they are not RWs, unless they are mislabeled. I'm not aware that there is an option to delete. Looking at the physical written side, it looks as if the DVD is nearly full, but only the most recent files are shown, which is not nearly enough to fill a DVD.
Quote: Originally Posted by SledgeDG
Are those re-writable DVDs ?
I mean is there any chance that you accidentally set it to always delete before writing or something like that?