The pictures are pretty random. It a mixture of pictures from camera and downloads. Which I done various things with, reddit, discord memento database, drive, or just moving to another folder. I use Verizon Messager though.
Thanks it worked for me also but I had to get it down to 67%.
For those that can't open up app cache storage download Files by Google it starts working with less memory for whatever reason, and if still not just start clearing up files and deleting apps.
(Yeah I'm talking you GuccizBud, sorry the reply button didn't load) Fix the issue, you mentioned you switched file managers but I'm not sure not how you did that (is just a nova launcher thing or would it work for adw launcher too)