My tablet is freezing up frequently. Can you help me figure out why and how to cure it. (Details)

It’s a Samsung Galaxy 3 which I bought used (and back to factory specs) and it was working fine until just recently.

I’m hoping to avoid the necessity of wiping it and restoring it back to factory (and presumably losing data stored on the apps I’ve been using, particularly Spotify and a few games).

I’ve deleted a ton of apps to make sure that I’ve got plenty of space even tho when this first started it still had about 3 gigs free space remaining.

That helped a little bit but not much. Now instead of freezing up every 2–3 minutes (that’s NO exaggeration) I can get about five minutes of use before it locks up necessitating a restart.

Any of the Fluther Techies have any advice.