Those things are ancient, too. It’s annoying that there are no tiny cheap Linux SBC’s like that, which you can straightforwardly buy.
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.
Transcend Wifi SD Card
IsWas A Tiny Linux Server.8 years ago, this article is from 2016. I wonder what progress was made if any, both security wise and performance wise.
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?