Just checked my node and had to do a double take and stop myself running to the server. Thought I borked my system last night while i was tidying up the log file, Luckily all is well!! (I think/hope!?!?)
Looks like the garbage collection routines have started on my node. It was 85% full yesterday, and it’s now reporting only 25% full. (physically the disk is still 85% full). Hopefully if everything is OK once the files are finally physically deleted I can stop worrying and put off buying a larger HDD for a few more months!