Hello everybody,
I've got a LG G4 (and used to have a LG G2 with similar issues). Whenever I plug in my phone to the computer, JRiver instantly recognizes it. It also recognizes the SD card of the phone just fine. I select the SD card under "Drivers & Devices. However, it takes ages for JRiver to stop saying "Working...". This is also the case with the Internal Storage, by the way.
Whenever I hit "Sync now" nothing much happens. In the Action Window, it very quickly goes to "100% import done". I guess what happens is that JRiver tries to copy file to a full memory card without deleting anything. So I have to remove all the songs and playlists on my phone manually first, before I hit "Sync Now". So actually not much "syncing" is being done.
Only after deleting the songs on the phone first, JRiver nicely copies the playlists and songs I selected for import to the phone. But on the phone, the playlists are completely empty (0 songs).
I've had this for ages now and I finally decided to reach out to see what I'm doing wrong. I'm using Windows 10 with JRiver 21 but had the same issues with Windows 7 (JRiver 20) and the LG G2. I tried different audio software on the phone, but that doesn't help. Android version is 5.1 but had the same issues with 4.whatever.