I’ve recently added the Plex App to my Mac. One of the great new feature is that I can download files and it will save them locally. Generally, not a problem but on a phone or something it is great for spotty network connections. Download your music and go to the gym… don’t work about bad networks. One of the first questions i asked is where are these files saved? We’ll here’s the location for a mac: To view this i used the tool “Commander One” utility. You can keep this directory clean by just using the Plex App. You delete listened too or unused files.