Question: How are dictation files erased?

To erase a selected file, press the ERASE button. The LCD screen will display FILE ERASE? for approximately eight seconds. While it is still flashing on the screen, press ERASE again. When the file is erased, the screen will display ERASE DONE. File numbers will be reassigned automatically. Locked files cannot be erased. Erased files cannot be restored.

To erase all of the files in a folder, select the folder and press the ERASE button for three seconds or longer. The LCD display will flash ALL ERASE? for approximately eight seconds. While it is still flashing, press ERASE again. When the files are erased, the screen will display ERASE DONE. Locked files are reassigned file numbers in ascending order. Erased files cannot be restored.
Verification Source: Olympus Website