I started using DVD's to back up my data using NTI's Data backup program, but am now unable to access the DVD. I mean I cannot even open the DVD file by clicking on it in Windows Explorer. As if this wasn't bad enough, the properties windows show I have about 1.3 gig of data spread out over three DVD's, most of which is on one DVD. When I did the back up, it backed up (or at least I thought it did) almost 12 gigs of data. WTH?? I just found a way to open the files using the program I used to burn the discs but something does not seem right here. The properties window shows I have 378 megabytes on one DVD, but when I open it in NTI, all of my file are on there? W-T-H???? So to review: I cannot open the DVD files. The files don't appear to be all there.