So after discussions on home storage, I'm going to do a weekly cleanup/report on what I've achieved. Here's the baseline;
Main Server; 927GB of usable storage (via Drobo) - 768GB in use. (82.84%). In fact I've consolidated a pair of mirrored 400GB drives onto the Drobo to make the full 768GB, so I've already freed these drives to be removed.
C: - 103GB total, 75.4GB in use (73.2%)
L: - 38.7GB, 34.85GB in use (90%)
I've included both C: (O/S) and L: (data) as my offline folder is on the C: drive
C: - 57.2GB - 34.3GB used (60%)
D: - 97.6GB - 4GB used (4.1%)
E: - 274GB - 133GB used (48.5%)
So that's the baseline. The first saving is to delete the Exchange backup - 314GB. More to follow.