[dnanian]

I'd make a new, complete backup to another drive, partition or sparse image, Arnaud. You've sort of managed to get yourself in a pickle by mixing up files and images all over the place.

You CANNOT use Copy Newer or Copy Different and expect to get a bootable backup, unless you isolate that update to just your User files, and even then you're going to get a mix of the two sets of files... probably not what you want (but maybe it is).