File handling on iOS is too inconsistent. You can save and open files in various places on iCloud drive or even on your local device, but the rules about when you can save files and where you can save them aren’t clear. The user can’t create folders arbitrarily, which is frustrating. The On My Device area is especially confusing—so much so that even technically savvy users don’t understand that your iOS apps can save files to your iPhone or iPad without also syncing them with iCloud Drive. (A major feature if you’re out of iCloud space or on a metered or slow Internet connection.) You can’t create or open Zip archives using the Files app. With a little bit of focus on the details, Apple can clean this experience up and make it much better than it is today.
— Read on www.macworld.com/article/3397042/ios-13-wish-list.html