Memory cards from our big(ish) ‘real’ camera. And some Action Cameras. Easier and faster than connecting the actual camera via USB cable.

We mostly use Micro-SD memory cards these days, but SD to a micro-SD card adapters are easy enough to use.

On my older MacBooks I had a compact Micro-SD to SD adapter that when inserted would sit flush (or nearly so) with the outside edge of the laptop. So the card could stay inserted and not be easily dislodged or broken off.

This made it quite convenient to add another chunk of ‘disc storage’ that was always present but not taking away from the precious built-in SSD capacity. I mostly used it for bulky files that were essentially read-mostly so the speed limitations were not a big problem.

I see there are now micro-SD cards with 1TB capacity selling for a few dozen dollars. That is, um, rather inexpensive for adding a TB of ‘solid-state disc’ to a laptop.

Some laptops used to be able to (alternate/dual) boot from an SD card containing a bootable disc image. Is that still a thing?