16 ios already has that. look in your photo album. there’s a screenshot folder & duplicates folder. get rid of duplicates & empty the screenshots

i was in the apple store for another reason & asked the person who was helping about the system data. i asked if it would be better if i restored my phone via itunes & he said no. he said it’ll doesn’t make a difference, it’s just how ios makes the system run optimally. he said that because i have so much storage, the ios just will use more of the storage for the system data so things will run faster. but looking at op’s storage, idk if he’s just speaking bullshit.