I know that to do this, I must go to steam settings, download, and make a new steam library on the USB. The problem is that my /media does not have a drop down and if I select /media it says "selected folder must be empty." I'd like to know how to get steam to recognize my flash drive so I can install games there.

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3 Answers

As I know that, you can go to Settings -> Downloads then click on Steam Library Folders Then you can add folders wherever you want.

/media should have a selectable subfolder when the drive is plugged in, /media istelf is a part of the parent filesystem.

To go before @DrKNa's answer,

This looks as though your linux box is not recognizing the drive. Depending on the OS (SteamOS is an offshoot of Ubuntu which is derived from Debian which is what I am most familiar with.), you could run lsusb when the drive is plugged in, if you get a response that has the manufacturer of the drive then the kernel has recognized it.

Bus 002 Device 004: ID XXXX:XXXX MANUFACTURER DEVICE

At this point, ls /dev/sd* should list your main

/dev/sda /dev/sda2 /dev/sdb /dev/sdd /dev/sde
/dev/sda1 /dev/sda5 /dev/sdb1 /dev/sdc 

Now cd /mnt; mkdir usb; sudo mount /dev/sdb /mnt/usb/. This will mount the drive in /mnt.

Alternatively, Insert the drive into the usb slot and run dmesg in a terminal (Ctrl+Alt+T) and your system will output kernel messages to the screen, the last line should be something about the usb device.

[232637.544579] usb 1-1.5.2: New USB device found