Thanks Alex. That explained a bit.
Now I will make a new partition on my HTPC and name it X:. I'll map the directory on my server to x: on the klient. That way I should be able to use the 2 different libraries and make backup on my server and restore on the second client to get the smartlists on both.
Were the folders left behind really empty?
If they were, then it's likely they were not removed because they were locked (in use) by another program or the OS itself.
Yes they were empty. But there might be a good explanation for that. I replaced D:\MP3 with \\servername\MP3 and the made a playlist export long before the saving moving process was complete. I then renamed and moved it back.
I did this in the hope that the playlists would be made with the right path thingy. Bah. I guess that was a stupid idea.
What REALLY troubles me though is this. If what you tell me is right the files whould have been moved from my HTPC (D:\MP3) to my server (\\servername\MP3).
What really happend was that it got moved from my E: drive on my server to a MP3 subfolder on the same drive. From the drive root, e:\MP3, it was move to e:\MP3\MP3. The empy folders was on the server. My backup library!
I don't really understand why it moved the backup library. I'll be up all night scratching my head I guess.
Next time I WILL try a few files first, yes.