New documents are added to the alphabetically last directory in this dir. If you are running out of diskspace, you can symlink in disk1 from another drive.
Under disk0/ is 4 levels of directory each numbered 00 to 99. This is to solve some problems with UNIX systems with many files in a single directory.
These aren't very interesting. The next interesting directory level is:
- disk0/00/00/00/01 - This is the path to eprint number #1.