[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…
What I really want is an iPhone charger shaped Linux server that plugs into the wall and has a usb port on it and WiFi. Then I can use it to make any usb device programmable. Printer, webcam, hard drive, monitor, touchscreen, whatever.
Apple's old airport express was kinda that. You plugged it into the wall and it was a wifi repeater, had a USB port to make your wired printer wireless, and a 3.5mm jack for airplay to speakers. It was about the size of a macbook power brick, but for 2004 you can't complain.
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.