Better explanation

README.md

@@ -104,6 +104,15 @@ Options:
 
 ## Seafile on-disk storage
 
+Seafile sees your filesystem as an entity to store objects having IDs.
+So, all files in Seafile's storage follow the following pattern:
+
+```
+.../storage/{commits,fs,blocks}/$repo_id/$obj_id[:2]/$obj_id[2:]
+```
+
+The following schema explains how these objects are linked between them and how to read them:
+
 ```
  storage/commits/(repoid)           storage/fs/(repoid)          storage/blocks/(repoid)
     (plain text json)                  (json + zlib)               (chunk of raw data)