I just use by "Artist".
james
There are couple of things to consider.
1. The more sub folders you have, the more time (slowest) the scanning and indexing process will take.
2. MPD does NOT "arrange" the structure of files. It is up to the application you use to display them according to your preferences.
I use the following:
Artist - Album
For example:
The Doors - Morrison Hotel
The Doors - Strange Days
The Doors - The Soft Parade
Songs are arranged in the following way:
01 - Tell All the People.flac
02 - Touch Me.flac
03 - Shaman's Blues.falc
If you need to copy an album, you just copy the relevant folder.