Where do I find storage and free space information for my micro SD expansion card? I can't find any information about it, except that it's mounted under /media/furios.
@jonc lol, yeah, the furios onscreen keyboard is awful. yours isnt the first post ive seen where someone is trying to get help with someone and mentions that they cant use the osk.
@jonc solve the osk problem, or just complain more about it so the squeaky wheel gets some grease, and then use df or df -h ... (pretty sure df stands for diskfree)
There are several graphical apps that show disk usage (including the SD card), e.g. baobab. Install the version from the repo, not from flathub: sudo apt install baobab . You will find an Icon on the homescreen named "Disk Usage Analysis".