[jamesone111] bought a Transcend WifiSD card, presumably for photography, but it may just have been because he heard that they’re actually tiny Linux servers. He read a post about these cards…
Along the same lines as the Transcend card is Blue SCSI which is a little raspberry pi based SSD for vintage Macs that lets you FTP into the drive from a modern machine for file transfer.
I had the FlashAir which is more or less the same thing. Loved it. Used it for quickly retrieving underwater photography without unsealing the camera as well as backing up dashcams, security cameras, and other such quality of life, never have to touch it kind of applications. I would totally buy more if they come back in fashion. Micro SD is probably impossible, but a girl can dream, can't he?
Don’t forget that every recent Intel CPU contains an extra 486-based system on a chip running a stripped-down version of Minix (a predecessor of Linux), to implement the remote management engine.