I'm looking to create a portable, bootable Linux system to take with me, encrypted with some wallets. I'll probably end up using ubuntu, since I'm familiar with it. But I need to get a drive. I don't need anything big, but I've never tried installing an OS on a flash drive and I was wondering how viable it is? Unfortunately the smallest disk drives that seem reliable are all 80gb plus and $40 or more. But if they're a better option I'd probably choose that. Any ideas or recommendations?