Marantz professional PMD-526C Guide D'utilisation page 14

Problem
No Device appears even
when a USB device is
inserted.
Files on a USB device do not
appear.
Files on a USB device
cannot play.
File names do not appear
properly.
14
Solution
Disconnect and reconnect the USB device
to make sure it is securely inserted.
Make sure the USB device is of a mass
storage class or compatible with MTP.
Make sure the USB device is formatted
using a FAT16 or FAT32 file system.
Do not use a USB hub or USB extention
cable.
The unit does not supply power to USB
devices. If your USB device requires a
power source, connect it to one.
Not all USB devices are guaranteed to
work; some may not be recognized.
Make sure the files are of a supported file
format. Files that are not supported by this
unit will not appear.
Make sure the USB device uses a folder
structure that the unit supports: up to 999
folders (up to 8 folder levels, including the
root) and up to 999 files.
If your USB device is partitioned, make sure
the files are in the first partition. The unit will
not show other partitions.
Make sure the files are of a supported file
format. Files that are not supported by this
unit will not appear.
Make sure the files are not copyright-
protected. The unit cannot play copyright-
protected files.
Make sure the files are using only
supported characters. Characters that are
not supported will be replaced with a "."
Please see:
Other Information > USB
Devices