I have a 2016 Prius 2. I am one of those weirdos who actually likes to keep their music on a USB drive, rather than use the 'cloud' or streaming, or whatever... Now, one thing I like about the Prius (well, this one; the '08 didn't do USB drives) is that it can handle a 128GB USB 3.0 drive with no issues. So, I have my drive plugged in all the time, and I am afraid that the little cover is going to be broken (because that's happened on previous cars), and there are time when I need to switch drives because the spouse is in the car (different tastes in music). Therefore, I decided to perform an experiment: let's see how the car will handle a USB hub! Since it was an experiment (a techsperiment!), I didn't want to spend too much money on a hub, so I went for a cheap-nice person USB 2.0 hub with four individually switched ports (cute, but not necessary). The first thing I tried was plugging my 128GB USB 3.0 drive into the hub (which was plugged into the port for the car). No worky. Then I plugged a 16GB USB drive in, and the radio recognized that. Turns out, the hub can't handle a 128GB USB 3.0 drive (verified this with the laptop). I got what I paid for. What I discovered though, is that the hub works fine with 2.0 flash drives, and the car can see multiple drives! I am kinda short on 2.0 drives, (as in, I have only two), so when I select the Sources page, I can see the two separate drives as individual icons. This makes things simpler (in the long run--I have to get a better hub first) because I can simply switch sources without having to shuffle drives around.