Limit the size of the ./home/wraith folder. Mine was 32GB.
I have a 50 site plan which provides 200GB of storage. I run the LW MWP Tools plugin in order to monitor my server RAM, CPU, Swap and Hard Disk usage. I was at 88% hard disk usage and requested the breakout of any folder with more than 1GB. That showed the ./home/wraith folder was 32GB. In case you don't know the wraith folder stores all the visual comparisons for plugin updates. There should be no need for this folder to grow to this size. I think it should be auto deleted or overwritten after X number of days (3, 5, 7?). After getting support to clear that folder my hard disk usage went from 88% to 71%. Then were able to run some safe commands to remove additional files in the ./var/lib/docker which was 27GB for me and now it's 7.5GB.
On the MWP platform system files count towards our storage and currently they aren't doing the best they can to limit unnecessary growth in the wraith folder. Please upvote this and hopefully they will create a script to purge this folder.
All said and done I went from 87.8% disk usage to 61.8%.