Hello,
I have to play on a Prime 4+ this weekend. I imported my library in Engine Dj and synced it to the SD card. This worked reasonably well (the downbeats were never detected correctly, but who cares) - BUT: when I go through my playlists on the device in the library view, it doesnt show me the Artist or the Title, but only the filename - and oc bpm and key. When I load the track I get the info.
Please help 
There’s an option in the settings to display either file name or metadata. Most people have the file names as Artist - Title anyway, so it shouldn’t make much difference.
You will be surprised ah
Track 1.mp3
I had like a third of my library with useless file names. During the lockdown was when I decided to tackle this.
It’s not a small task at all because you can lose all the performance data and a program like Engine will simply see it as a totally new file.