So the other day I tried connecting my external hard drive to my v20 via normal USB to USB Type-C and realized that as long as the hard drive is in the right format, it works! Only issue I noticed is that it drains battery like a mofo so I'd only with a decent amount of battery and only for transferring of data. I wouldn't watch a movie or play music that's on the hard drive. It also works with USB thumb drives and that will use less battery