Can MineOS read USBs?

I’ve just downloaded and set up MineOS on a computer that will be dedicated to running only the server. (MineOS is the only operating system on the PC). Now, I want to import my old world on to the server, so I’ve zipped the folder that contained all my server information (coming from OSX) and put it on a USB. The guide on the wiki says “The web-ui supports imported servers from any OS (including Windows/OSX) via the ‘Create Server from Archive’ tab. All .tar.gz, .tgz, and .zip files dropped in the /var/games/minecraft/import directory are listed.”

How can i drop my zipped file into the folder if I can’t even find the USB or file? All the commands I’ve tried seem to be unavailable (ie. locate or find).

Can’t see why it would be an issue. As root:

mkdir /mnt/usb

mount /dev/sdb1 /mnt/usb