I use a 256GB OCZ Vertex 4 SSD in an external case for a laptop hard drive. It took Uconnect a couple minutes to read it and sort through everything. But the thing recognized it and can read from it.
The problem with those little San-disk FIT USB thumb drives is they get really hot really fast and it affects the read and write speeds of the drive. Not to mention, once they get full they slow down significantly.
With an SSD in an external case there is no heat and there is now slow down of data bandwidth or size limitations. There's also plenty of room in the lower console to hide the external case with only the end of the USB cable showing, plugged in on the dash. All still plenty low enough for no one to really even see any of it anyway.
My library is currently over 60GB. I can shuffle for centuries