I feel like it’s not something you see very often here compared to other items like knives and fidget items.
I have a JEYI 2230 NVMe case with a 1TB drive I keep on my keychain for backups of things that would be annoying to lose like my AntennaPod stats
When I did much more general tech support for whoever asked, I carried a Live USB drive to boot from. I don’t offer that out anymore though, so no longer carry it. The closest to something digital would be my yubikey, and thats only EDC because its in my wallet