I'm more than mystified as to how I could blindly ignore the fact that my Drive W is entitled 'BACKUP'
To be brutally honest, I'd actually all but forgotten that I had SyncBack operational, it just 'works', and I think there have only been two occasion when I've had a need to even look at any backup and none where I've needed to 'restore' anything.
Yes dseligo, SyncBack is 'incremental', only backing up files where the time/date are different.
The major point that I found appealing when I first came across it, is the fact that it doesn't compress the files into a .zip or 'catalogue'; meaning that you can easily find, and indeed recover, any file without recourse to the program or any 3rd party software (other than MS File Manager of course).
It's also unfortunate that Drive T & Drive W just happen to be on the same PC --- it is the only one of the 10 'profiles' I have set up that that is the case - all the others go to drives on network PCs.