Elav is preparing a tutorial on installing Arch Linux , and for that tutorial he needs this other one 
Well, to the point 
To create a LiveUSB, or as it's commonly called, a USB installation of Arch Linux , let's try using Unetbootin . To do this, we need to install it. If you're using Debian or Ubuntu , use the following command:
- sudo apt-get install unetbootin
If you use ArchLinux it is with:
- sudo pacman -S unetbootin
And so it goes with other distributions, but if you use Windows, well… here's the download link: Download Unetbootin for Windows
Once they have it ready, they must open it (with administrative permissions), the following will appear:
We must select the " Diskimage " option, and click on the button to its right that has 3 dots (...)
A window will open, through which we must search for the Arch ISO, which we should have previously downloaded (if you haven't downloaded it, click here ).
They should look VERY WELL in which USB device they will put the installation, I recommend that they do not have ANY USB connected, nothing more than the pendrive in which they will make the bootable:
Once you have correctly selected the USB drive, press OK and the process will begin.
When this is done, it will look like this:
Okay, it's almost ready 
Now comes the most important part… it turns out that Unetbootin is not fully compatible with Arch Linux , and we need to modify a certain file on our USB device for it to work.
On our USB drive you will find the syslinux.cfg file ; open it and you will see this:
Look at lines #9 and #14 . We need to add the tag/label/name of our USB device there; otherwise, it won't work. The example flash drive is called pendrive2GB , so that's the name we need to use. We'll add the following between those lines: archisolabel=pendrive2GB
Here I show you how it turned out:
We save the file and that's it 
Nothing else 
regards