AW: It may happen, depending on the assignment of USB memory devices connected to the USB hub, that the media drive indicator does change the address of drives assigned before, due to dynamic assignment of drive letters by the system.

If you have problems with file playback from USB sticks, make sure that the USB media is formatted correctly before use. Windows Vista, Windows 7 and Windows 8 give you the option of a quick format or full format process. For any problems encountered with USB sticks, applying a full format is recommended. Make sure that the checkbox at formatting options -> Quick format is not enabled. Also make sure, the FAT32 file system has been selected. Do not use NTFS, HPFS and EXTFAT file system / format settings.