OK -- went to Settings > General > iPhone Storage. Nothing big there except 16GB SYSTEM. There are all the apps listed too, but those should be covered by the Apps category.....and not in that 19GB OTHER category.
I has this issue. when I restored from iTunes. I has like 40+ gb of other storage basically filling up my 64gb Max. Think it has something to do with iCloud photos. I wiped and restored from iCloud and I didn't have the issue. weird tho.
Are you restoring from iTunes?
Yep. iTunes restore. I kept disconnecting and reconnecting to iTunes and now it is showing 3.41GB of OTHER. I may just have to start over and do either a backup from iCloud or set up as new and re-install every thing.