Is there anything I can do about this extremely vague block of data that’s taking up 30% of my phone’s storage? Mind you, this isn’t the operating system itself, as that’s listed as its own category.
EDIT: I tried (a) backing up to my computer, factory resetting, then restoring from backup and (b) setting the date years in the future. Neither worked, in fact (a) actually increased my system data to 34 GB! What DID end up working was updating my iOS from 18 to 26, which I had to do from my computer via iTunes since my phone was full. Apparently major system updates reset system data
Do a factory reset. Mine got up to 30GB. I did a factory reset and now it’s at 8GB
This 100%. Friend had theirs get to some 50+ Gb. After backing it up to iTunes, resetting the phone, then restoring to the backup, it all cleared up. My guys is it’s some sort of bug, (or collection of bugs), that prevents temp files from getting deleted properly. After the restore, all she had to do was reset face id and log into a few apps. All the stuff was still there minus expected stuff like Spotify downloads.