Support for Windows XP ended 2014 … There are no versions of WD Backup (released in 2018) that support Windows XP.
The only older software that WD had for backups that supports Windows XP was WD Smartware (link below)
EDIT: Found this WD KBA … doesn’t sound to me the backups are compressed ?
EDIT 2: this post was also interesting … The code you list could be a folder under xx.swtor. If you opened WD Backup.swstor, continue opening folders until you find one with History and Volumexxx. The Volume folder should contain all the folders and files you selected to backup
