Double File
Examine your file collection: what's backed up; disk usage.
On the surface, Double File may look like WinDirStat (from which it borrows code) or similar graphical drive utilization utilities: e.g. the second assembly 'Volume Treemap'. However, Double File is project-based: it saves file checksums in directory listings you store locally. It facilitates planning and transitioning between computers and operating systems: snapshot your drive and safely archive it.
Listings can be searched when volumes are off site. Can read any volume mounted in Windows...