I had that exact model but had problems with the installer when it came to android, as in it didn't work. It booted off the USB just fine though.
I'd personally just use a mini USB stick that sits flush with the chassis and have a dual boot set up. Hell, it's probably faster than the internal storage.
It's a shame it can't boot from the sd card, that would have been great.
I just installed straight onto the internal hard drive and wiped everything else after trying out booting from external USB. Was using ubuntu booted from SD before and have ended up binning that completely and just running android from the hard drive. It's breathed a lot of life back into something that just sat in the cupboard. I didn't try booting from an SD card btw but ubuntu light never particularly liked it anyway.
I just installed straight onto the internal hard drive and wiped everything else after trying out booting from external USB. Was using ubuntu booted from SD before and have ended up binning that completely and just running android from the hard drive. It's breathed a lot of life back into something that just sat in the cupboard. I didn't try booting from an SD card btw but ubuntu light never particularly liked it anyway.