Apple Music iTunes Library
I have a big collection of music (4TB) all stored on an external HD (by artists folder) which worked fine the last 13 years on my old iMac Mountain Lion and iTunes.
Now I tried to use my MacBook Pro 2020 and Apple Music to import these files (I absolutely want to keep the music on the external HD where they are) and it seems absolutely impossible.
The issue is that the process takes roughly 10h (!) and trying to just import my music has become utterly frustrating now. I did the following:
On Apple Music
I hold the option key to chose new library
I configured the path for the music to be my external HD.
I then "import" the file and you see them being imported.
After 10h, the import process is finished but my library is either empty or only showing 40 albums (from thousands) and these 40 albums vanished completely when closing Apple Music and reopen it.
I also tried to choose a library I succeeded to built on another iMac with Catalina. Works fine but all the album covers are gone while when you play a song, you can see the album artwork on the track.
I believe this solution being bad as there is no way I will search again for the album artwork for thousands albums (music being ripped from CDs often. Worse, you can't save the library as the "saving library" wheel get stuck for hours...and the only way is to force quit.
What and HOW is the best way to create a new music library from an external HD (and keep the music on this external HD) on Apple Music.
It should be a straightforward process, dealing with iTunes and anything related to music has been my biggest nightmare when it comes to Apple products.
Any help welcome, many thanks