I recently decommissioned an old Western Digital “MyBook” from before 2010 that had been my parents NAS when I lived with them, in the house they had where I grew up. Because I was not sure if there was something worth saving on the various backups and WD used I think an ext* filesystem, I had to restore it (1.51 TB) to a local drive to go through it.
I have a 1.81 TB drive as D: but it was half full of dashcam videos and also the most recent backups from before my parents and I went different directions. To get around this, I copied the oldest backup of my father (Windows 7 backup, using those opaque *.wbcat files) off the drive, deleting them from the NAS, and then removing obvious and large duplicates v. the most recent backup I had. I did this through 5 backup sets before getting to my mother’s backups, which used File History.
Somewhere in there I took a look at my dashcam footage and found that I had kept recordings of my back seat when the rear camera just sat on the cushions waiting for me to fix the mounting. I forget how many GB that was, but each video segment was maybe 300 MB for a few minutes.
Anyway, I have pared the duplicates (via SearchMyFiles, unpaid recommendation) across the 5 NAS + 1 prior (most recent) backups so that I have more than 10% free drive space on D:. This means Windows no longer colors the bar graph red instead of blue. YaY!