Tap [User Box].
Tap [System] - [Bulletin].
Select the desired User Box, then tap [Open].
If the box is password protected, tap [Open] and enter the password.
You can also open the desired User Box by tapping it twice.
Set the desired operation.
Select a file, then tap [Delete]. The file is deleted. You can select multiple files and delete them simultaneously. Check the file details, then tap [Yes].
You can tap [Details..] or a thumbnail image to preview the file image.
If you tap the tab key on the right of the screen, you can display or hide the Setting Key. The Setting Key allows you to enlarge or reduce a preview image.