Using an Android Galaxy S5, for some reason (It’s possible I set it up by mistake or without knowing what I was doing), Plex app on my phone is Syncing/Downloading material I don’t want, and is using up my data. Any idea how to turn it off?
If you don’t want to use up your mobile data, I would suggest, in the Android app, going to Settings / Sync / Sync Settings and turn off “Use mobile data”.
It’s hard to know how you set up the sync job. But if ti is obviously doing something you did not expect, the easiest just might be to delete the job and start over. You can delete the job from the app by going to Settings / Sync / Sync Status, finding the job(s) and deleting them.
I would need to know what you want to help you set up the new job correctly.