I have 50+ GBs free why does PLEX say 29.5 is the limit?
You probably need to go into the Settings --> Sync --> Storage Limit (make sure you physically touch the “Storage Limit” and it’ll bring up a slider) and change it. It sets a limit when you install the app but you can change it to whatever you’d like.
Yep, I just realized I could “tap that” and the slider came up. 
Yep, its not the most obvious thing. Glad you found it. :-bd