the MODE Button to confirm.
Deleting file:
In voice playback stop mode, tap MODE Button to enter the submenu, select Delete and tap MODE Button to confirm. Tap 
/ 
to select the file you want to delete and then tap the MODE Button to confirm. Tap 
/ 
to select Yes or No, and then tap MODE Button to execute.
Delete all:
The procedure is the same as Delete, but all the files in the folder will be deleted. Exit: Exit from this menu
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