Q-See QSD6204 - Manual (Page 24)

7.1 Hard Drive Format
When you press the “SELECT” key you will be prompted to input a
Password when the hard drive format menu appears.
Type Password (6) ::――――――
HARD
DRIVE
FORMAT
When you key in the correct password the following message will
flash 3 times.
“password correct Hard Disk Formatting…”
Otherwise, the following error message will be displayed on the
screen.
“Password Incorrect”
Notice: The Factory Default password is 111111.This number (1)
corresponds with the button for camera “one” on the front of your
DVR.
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