The USB port in the car is not smart like a computer. I don't see how a hub could work to go from one device to another in the car. The port works well if you want to put in a small USB thumb drive with music files. I use a little thumb drive 32GB inserted into the slot that can hold a lot of music. I transfer the files from my computer to the thumb drive. Be careful on the format as the car's system can see MP3, WAV files and some others, but not all music file formats. i found some of the Apple music encoding doesn't show up as recognizable files. it has to be changed to MP3 format. It is still easier to use bluetooth from your phone or iPad and use the music interface on he phone to change songs or albums. just switch bluetooth connections, disconnecting one and starting another.