I chose the format option where it acts like a USB
I put nearly 3gb of files onto it.
When I started it back up in normal mode and went onto my DVD there is nothing on it but instead of the 4gb free there is only 1gb free.
When I try format it, it tells me to format the 1gb. Can I access the files I already have on it or format it so that I get all the space back?
Yep, it was a new disk. When I put it in & opened it, it asked me how I wanted to format it, like a USB where I can move files on or off or just Burn the files on.
I've never really known that to actually work. Then again, I don't know much about CD-R's/DVD-R's in the first place. Why don't you just buy some more? You can get a whole case of 4GB CD's for like $8-14 at RadioShack.