You can erase all files in the selected folder.
Press FOLDER to return to the folder window before erasing the files and select a folder from which all files are to be erased, and then go to the menu window.
tab - “Erase All,” and then press
.

“Erase All Files in the Folder?” appears on the display.
or
to select “Execute,” and then press
.
STOP to exit the menu mode.
.