Connecting a USB memory device to the USB port
For operating instructions see “Playing a USB memory device”. link
Marantz 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.
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.