Otherwise, best i can think of is to get iExplore or something like that, which lets you navigate the iphone file structure via USB from your computer. Don't think it needs jailbreaking.

You can set iOS 11 to automatically convert your HEVC and HEIF files to a format that compatible with the device you’re transfering files to. If you want to force an iOS device to transfer the ...

Furthermore, iOS' sandboxing structure makes it difficult for apps to access anything outside of their set permissions. Mobileconfig files, though, are used by cellular carriers, ...

After dropping a file, regardless of the format, into Waltr the app does some behind the scenes magic to make the file compatible with iOS and uploads it to your device.

Developers with access to the beta version of iOS 10.3 report Apple is introducing a new file system, ... You'll be able to revert your files back to the old HFS+ format, ...

So far, Apple has refused to support the format on iOS or even on iTunes, though that might be changing soon. Advertisement Reddit users report that they can play FLAC files on iOS 11 beta but ...