I've been looking for a USB drive to use to run BIAB, with the intent of copying PG's BIAB files onto the new USB drive and tucking the PG-supplied drive safely away. The problem is, I've tried several USB drives, and I've got an issue with how much power they suck out of a USB port. Currently I'm using a WD passport, which is a little flakey -- sometimes it mounts, sometimes it doesn't, depending on which USB port I use and whether I have other USB devices connected at the time. I've tried some other USB drives and enclosures as well, some supplied with cables to connect to two USB ports, but I'd prefer not to sacrifice two USB ports to a single drive if I can avoid it. So what I want is the most reliable USB drive (or enclosure) I can find, that draws the least amount of power. It does seem to me that some drives draw less power than others from a USB port, but I seldom see a mention of this issue in reviews online, or in a drive's specs. Can anyone recommend a particular portable drive, based on these concerns and their experience?