I’ve been seeing a recent issue that has been occurring for the best three Plex beta releases: the drive on which Plex is installed is filling up with over one hundred gigabytes of data in about 3-5 days. I’m currently running version 1.12.0.4829 of Plex on Windows Server 2016.
I cannot find the exact location where Plex is dumping the data other that it is the C: drive (and appears to be somewhere in the hidden App folder), where I have Plex installed. However, my media content is located on separate drives.
I can reclaim the drive space by shutting down Plex and restarting it. It will take several minutes for Plex to restart and during that time the drive will slowly empty to the point at which it started and then Plex will begin to run and can be accessed again.
Sometimes however, Plex will not restart after empting the drive and I will have to restart the server completely.
There might also be a massive sync job going on, where the transcoder is preparing a lot of files to transfer to a device or cloud storage.
Verify that all of your sharees or you yourself haven’t requested a sync of a whole library at once.
Thanks for these replies, but they do not explain why the hard drive empties itself when Plex is restarted. Video Thumbnails would not reduce in size, nor would Sync files (not that any Syncing was being requested when my drive was filling up).
It is more like a memory leak, but on the hard drive. Perhaps a cache?