Q-See QSW1001R User Manual page 18

(1) Press MODE to go to playback interface in preview mode.
(2) Press MENU to go to delete menu.
(3) Press LEFT/RIGHT to select Delete One, and then press
OK to confirm.
(4) Press LEFT/RIGHT to select DELETE or NOT DELETE option,
and then press OK to confirm.
Delete All
(1) Press MODE to go to playback interface in preview mode.
(2) Press MENU to delete menu.
(3) Press LEFT/RIGHT to select Delete All, and then press
OK to confirm.
(4) Press LEFT/RIGHT to select DELETE or NOT DELETE option,
and then press OK to confirm.
Format
(1) Press MODE to go to playback interface in preview mode.
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