Automatic save as backup when opening file

[Christopherdj]

I have been searching this site for assistance from other posts and have come up with variations, but I am not coversant enough to convert to what I need.

Can someone give me a VBA script or is it Bolean? One that auto saves a file as it opens one.
I'd like to have the file save the original name, but add date and time if possible.

As I have multiple users I cannot use read only, as I need up to date data.

For this purpose file name is "Class Roll 2015" Location C:\Rolls\
and
the folder for save as is in the same folder, name of ABC Backups Location C:\Rolls\ABC Backups\

Is there a VBA script out there that can do this?

thanks