1. There are 2 modes for the file version control. One is [ Basic mode ], and the other is [ Advanced mode ]。

2. [ Advanced mode ] means that any granted people will get the current version which may be modified by some otehr granted people. One needs to download and lock (check-out) the file before editing or making modification. After editing, upload and unlock (check-in) the edited file. No any other people can check-in the file when the file is checked out by some other people.

3. [ Advanced mode ] is the version control which keeps the file in a consistency status. It is very suitable for a team to control the concurrent access.