I have a 2014 Toyota Rav 4, which has USB compatibility. I have been able to get the 'entune' system to play a USB that is 16gb, but was hoping to format a 240gb harddrive to leave in the car with music on it. I have a mac computer and have formatted at MS-DOS (FAT) and ExFAT neither have worked. Was wondering if anyone has the same issue or ways to resolve it.