I recently downloaded AVG PC Tuner, and performed a disk check on my 1 TB external drive. When it completed, it found no issues. However, my hard drive is now almost full when I had about 200‑300 gigabytes free before.
I tried running "Disk Cleanup", but it showed nothing to delete.
I then downloaded and ran WinDirStat to try and see what's using up the space, but it says I have used only 607 GB: (click for full size)
Can anyone help me reclaim my lost storage space?
