Beyonwiz DP-S1 - Manual (Page 110)

Advanced Setup
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2-2. HDD
1) HDD Information
If you select this menu with the OK button, a pop-up window will
display a summary of the internal HDD. You can also check the usage of
the HDD. To close the pop-up window, press the EXIT button.
2) HDD Format
You can delete all files on the HDD. If you select this menu with OK
button, a confirmation pop-up displays. If you select “OK” on the screen
and press the OK button, the DP-S1 will restart and format the HDD
automatically. If you do not want to format the HDD, please select “No”
on the screen and press the OK button, or press the EXIT button.
NOTICE
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You have to wait until the DP-S1 formats the HDD successfully, it
takes several minutes. The front display shows the status. Do NOT
TURN OFF the unit until this function has finished