Philips VTR8000 User Manual page 73

reference picture showing deleting steps are as below:
If the device shows the interface on the left side, select "+" or "-"
button to choose to delete single file or all files. If the device shows
the interface on the left side, select "YES" to confirm deleting or
"NO" to retain file by " " or " " button. Press Menu button to
execute the option.
73