Grundig Venti series Instruction Manual page 22

Do NOT unplug your Hard Disc or your USB device during formatting or it will damage your device.
Speed
If the speed of your Hard Disc Drive or USB device is too low, it will not be compatible with this TV and FAIL will
be displayed on the screen. You will not be able to record with the incompatible device.
Free Record Limit
After formatting is complete, the unit will internally calculate the approximate number of hours your Hard Disc
Drive or USB device can use for recording. You can check this in this menu.
Restore Factory Default
Press the ▼ or ▲ Buttons to select Restore Factory Default and press the OK Button to enter the guide. Once
confirmed, all the settings will be cleared. This should be used if you experience any issues with your TV.
Lock Menu
To enter the Lock Menu, press the MENU Button, then press the ◄ or ► Button to select the Lock Menu, and
press the OK Button to enter.
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