My work MacBook Pro (mid-2014 edition) only has 512GB of storage. I had tried to order it fully loaded, but somebody upstream fainted from shock, despite the fact that my previous machine was nearly 8 years old.
I’ve got to do a lot of tinkering with VMware and Docker images for working out the IT infrastructure in our new building, and there’s just not enough space for it all on the internal drive. And since Apple solders everything to the motherboard these days, there’s no way to upgrade without replacing the machine. Browsing for small external SSDs, the Samsung T3 seems to be well-rated.
The only problem I can report so far is that it draws more power than the left USB3 port on my Mac can reliably supply. Moving it to the right port got rid of the eject/remount every 2-3 minutes. I’m not using their encryption, because I don’t need it; also, there are some reports of the supplied Mac software being flaky, and I had a few bad experiences with the way the equivalent WD driver works.
By the way, if you use Docker on a Mac, it will graduallyrapidly fill your disk unless you periodically rebuild the Docker.qcow2 file (works best if you supply the names of the images you don’t want deleted). A fix is reported to be in the works.