[Inori]

You mean you want to install the actual arch OS to another USB, so you can go from machine to machine with the same arch system, and when I say arch system I assume you mean fully useable with a GUI, stuff installed, and that sort of shit not the live USB medium arch has. Just install it to another USB if that is the case. I've only done this once, and that was with, not arch directly, but manjaro at college for a few tests. There wasn't anything special I had to do, it just tret the USB as any other storage device.

If you just mean, I want to install arch how do I put their ISO on a USB run this as root. Replacing "sdx" with the device you want to install it to and filling in the arch ISO path.

Code:

(sudo) dd bs=4M if=/path/to/archlinux.iso of=/dev/sdx status=progress && sync

sorry if I completely missed the point.

My goal is a portable system like you mentioned, potentially with a GUI and all the rest, so thanks for the reply