Connecting an iPod or USB memory device to the USB port
To connect an iPod to this unit, use the USB adapter cable that was supplied with the iPod.
Denon does not guarantee that all USB memory devices will operate or receive power. When using a portable USB hard disk drive (HDD) which came with an AC adapter, use that device’s supplied AC adapter.
You cannot use the USB ports on the front panel and rear panel simultaneously. Select and connect the USB port to use. link
USB memory devices will not work via a USB hub.
It is not possible to use this unit by connecting the unit’s USB port to a PC via a USB cable.
Do not use an extension cable when connecting a USB memory device. This may cause radio interference with other devices.