Saving an updated live session on a persistent USB stick

Warning, Noob floundering about…

I created a bootable, persistent (4GB) USB stick of Mate 16.04.

The problem is that I can’t find out how to make it save everything. For example the date and time are right, but it does not reconnect my Bluetooth mouse.

It managed to remember one of my proprietary drivers (microcode firmware AMD CPU), but doesn’t know about the other one I need (Broadcom 4311 wifi).

I am using the “power button” top right corner to shut down.

Thanks, Fred