Contents stored in the USB drive cannot be recognized by the unit.
The contents in the folder or the total number of contents in the USB drive may have exceeded its limit.
Confirm the maximum number of folders / contents that the unit can recognize from the following chart
USB Type | Number of Folders | Contents per Folder | Total Number of Contents |
USB1 | No Limit | 256 | 20,000 |
USB2 | 255 | 256 | 65,280 |