Tap [User Box].
Tap [System] - [File Re-TX].
Select a file and 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].
Select a file, then tap [Details] to check the detailed file information.
Tap [Details..], and you will be able to preview the file.
To enlarge/reduce the preview image, tap [View Page].