NEC M350X User Manual page 72

Converting PowerPoint files and saving them to a USB memory
Viewer PPT Converter 3.0 will start.
Index name must be eight alphanumeric characters or less. 2-byte character and file with a long filename cannot
be used.
A confirmation message will be displayed.
Exporting a file will start.
Viewer PPT Converter 3.0 will exit.
NOTE:
4. Using the Viewer