Because only one of these programs backs up my photos and only the other backs up my email, I'm using BOTH the Maxtor backup software that came with the drive and the Windows "Backup and Restore" software that came with Vista to do my backing up.
The "Computer" utility that I use to see what's on my various drives claims that 398 GB of the Maxtor drive (out of the 465 GB "available") are "used", leaving only 67 GB "free".
However, when I look at the contents of all the folders on the drive (except for the "System Volume Information" folder that I can't see into) they only seem to have about 100 GB of data in ALL of them.
I thought perhaps the problem was that each incremental backup was setting aside a block of disk space that it wasn't necessarily using the whole amount of, so that defragging the disk might free up that space. But it turns out that the disk was set to be defragged every night since I started using it, so if I'm right about the problem, defragging the disk is not a solution for it.
A friend who looked into this for me (and subsequently pointed me in the direction of this forum) suggested that the problem was that a great deal of rubbish was being stored in the "System Volume Information" folder. But if that is the case, it isn't clear how to tell -- or what to do about it.
I'm not having this problem with my hard disk, so I also suspect the backup programs, but that also leaves me with a possible explanation that doesn't have a solution.
Can anyone tell me where the excess 300 GB of space has gone on my backup drive -- and how I can get it back before the drive "fills up"?
Thanks in advance,