Freeing Up Spaced

My 2TB passport is full, the PC drive it backs up only contains <1TB of data so I suspect that there are multiple copies of files as I have been moving around picture and movie files.
Is there a way of recovering this space or am I best reformation the WD drive and creating a new backup profile with my new and improved PC drive structure?

Hello and welcome to the WD Community.

First, make sure that you dont have two backups running at the same time.

If you have all the data on your computer as well, will be a good option to reformat the drive and create a new backup.