@tinygo.org I created a few example file servers for PicoW. They use 9P protocol to expose devices as file system hierarchies. The can then be imported into Plan 9, or Linux, macOS/P9P.
github.com/9nut/picow_9...
github.com
GitHub - 9nut/picow_9p_fs: A collection of TinyGo 9P File Server Examples for the Pi Pico W
A collection of TinyGo 9P File Server Examples for the Pi Pico W - 9nut/picow_9p_fs