Followup: Listener Jimmy Obomsawin • jimmymacsupport.com wrote in to provide additional information regrading changing the email address associated with your Apple I.D.
Jerry Talks about his recent European travels
Using USB-C and Thunderbolt 3 (USB-C) ports and adapters on your Mac notebook https://support.apple.com/en-us/HT204360
MacBook supports Target Disk Mode over USB-C, but you need a special "full-featured" (data/sync) USB 3.0 or USB 3.1 USB-C Cable cable. (Remember the days when all Apple products were “full featured"?)
Discussion and Rave Review Of The Tom Bihn "Synaspe 19" Backpack
"The Synapse 19 is a carefully calculated, supremely organized backpack, designed for day hiking, everyday carry, and ultralight travel. Its graceful, curvilinear exterior may on first blush look like something akin to sculpture, but in truth it is simply the judicious realization of ultimate utility. No mesh pockets clutter the exterior of this bag, nor extraneous straps festoon it; in it, you'll be able to carry more than you would imagine, and no one will be the wiser."