Hi no Infotainment mag so looking for an answer here. 64gig is the biggest size as 128gig was not found. I have 9,000+ songs on the USB and the USB interface basically resets itself. Shrunk the size of the USB to half which also did not work. Now I have created a folder per Letter and will see now that works. Anyone else have wisdom or issues with using the USB? FYI, Bluetooth from iPhone works fine until you plug it into the usb to charge. Once plugged in the Bluetooth connection is lost.
