Directory structure of file based content server

Hi,

does anybody know how the contentserver manages his directory structure?

Looks like:

0ebf

0ec0

0ec1

0ec2

0ec3

0ec4

0ec5

0ec6

0ec7

I need to know the 4-digit directory in which my ID ( for example: 4bfee75d19d04548e10000000a320513) is saved.

Any ideas?

Best regards, martin