I alternate between a few different backpacks depending on trip length, so I keep the core of my electronic gear in an organizer pouch. I can just toss this into whatever bag I want to take:
It’s a Vanquest EDCM-SLIM 2.0 8″ x 6″ organizer pouch with lots of webbing. Wild overkill for a geek bag. Vanquest makes lots of tactical, medical, and first aid organizers with Molle straps for military folks. I was really torn between this and their FTIM 5×7, but went with the EDCM after reading a couple of reviews that said the dual-zipper format of the FTIM was a little finicky to open.
Most of the gear inside is pretty self-explanatory, but a few links to my favorite stuff:
AmazonBasics 4″ USB-to-Lightning cable – I like short cables. I wish they made a USB-C version of this, but none yet.
Sandisk USB-C & USB flash drive – nice form factor with both USB-C and USB-A ends so you can pop it into a variety of computers.
Anker USB battery – old small cheap one just for emergencies. As soon as they make a small lipstick-sized one with USB-C, I’ll replace it. I have a much larger Anker PowerCore 20000 that I bring when carrying larger backpacks.
Not pictured, in the pockets: Airpods, snack bars, and single-serving packets of ibuprofen, Throat Coat tea, and lens wipes.