Samsung SyncMaster 400P User Manual page 115

MSC(Mass Storage Class)
: Devices using the SCSI(Small Computer System Interface) command set
Exception
: Some manufacturers have wrongly specified their device to be USB standard compatible.
Our product has exception handling procedures. But Some devices are unlikely to work properly.
: Some manufacturers have wrongly specified their device to be SCSI compatible.
Such devices are unlikely to work properly.
: It is recommended that USB devices are purchased after they are tested and confirmed to be compatible.
For pivoted monitors, video is supported up to the SD level.