Backup software often uses randomized strings for security and to avoid filename collisions.

This specific string appears to be an automatically generated or randomized identifier . Such strings are frequently associated with:

The software will automatically detect part .002 and any others to reconstruct the original original file. Security Warning

Right-click on the first file ( .001 ) and select "Extract Here" [2].

Ensure you have the first part ( ZZLSWRDHMP.7z.001 ) and all subsequent parts in the same folder.