NEC US40a User Manual page 141

Disabling Use of USB Storage Devices (Read and Write Disabled)
1.
On the [USB Storage Device Setting] dialog box, select [Disabled (D)] in [USB Storage
Device] block.
2.
Click [OK].
The [Settings Modify] dialog box appears.
3.
Click [OK].
Disabling Use of USB Storage Device
Settings Modify
Administrator Features 121