The library software on your computer is called Engime Prime. On the hardware it’s called Engine OS. Please don’t confuse the two, as it confuses others when reading your posts.
If you can export RB playlists to the USB stick successfully, why can’t you do that in stages? RB to USB to Prime 4.
As others have said, you have gone about things totally the wrong way. You really should read the manuals and follow the correct procedures.