I've searched around but haven't found someone with quite my issue.
I'm running Windows and have so far used Rufus to burn the iso to an external USB drive, and boot into it.
What I now want to do is to install Elementary OS onto the USB drive. However, when I boot into the OS and try to install, I only get dev/sda from 1 to 6.
When opening the terminal and running:
sudo fdisk -l
I see that sda is my internal drive, and find that the USB is dev/sdb. My problem is that the sdb volume does not show up in the list of partitions I can install onto.
Is there another way I can boot and subsequently install from the USB?