Mac desktop app data solution for managing iPhone File Sharing Apps data without iTunes!
I'm a computer audiophile and I like listening to different hi-def formats of music in quality music players in my iPhone, instead of the lesser Apple player & formats. iTunes 12.7 has, of course, eliminated my ability to import those quality files and enter them into the high-def player apps databases. File Sharing Apps, and all Apps for that matter, are gone for good in 12.7 (which means for a while, at least).
One solution I found today under iOS 10.3.3 and OS 10.12.6 (we will see about 11 & 10.13 soon) is to use a Mac app called PhoneView. I use this on my 2012 Mac Mini and can directly add or subtract 3rd party files files like music, docs, and videos, directly into the File Sharing 3rd party app (database) in my iPhone 7+. For example, from my desktop, I can add a 24/96 music file into HD Player on my 7+ and be listening to it through this mobile device right away. PhoneView also permits me to view, download and upload many other data types as well, but I'm more interested in music.
Other apps may able to the same or more, in either Windows or Mac, but I have not tried them. I have used Phoneview on and off on Macs for many years, as Apple adds of subtracts iTunes features, and it works quite well. After trying this software, I bought it in 2008, and the upgrades have been free since.
http://www.ecamm.com/mac/phoneview/
