VBA Macro - Keep Track History - Shared Files

Hi guys,
Been following for a long time but can't find any solution. Hope you can help me, again

Work with 4 shared files on the company server everyday. 13 co-workers make changes on them.
Sometimes i need to unshare them (for ex: to add data validation or conditional formatting), and as you all know, the Track History vanishes.

What I need is some help on making a Macro that allows me to keep the history on a file on my own Desktop, on a folder named "Backup" (called "Tracking History.xlsx".

Something like a log.

Tried to use http://www.ozgrid.com/VBA/track-changes.htm but haven't done what I expected.
Many thanks

Anyone can help?