Roland MV-8000 Owner's Manual page 331

8. Ext (Extension)
This is a part of the filename, used to indicate the type
of file.
Example
Explanation
extension
Waveform data (e.g., Windows
.WAV
wave file)
.MID MIDI sequence data (e.g., SMF)
9. Size
Displays the size of the file.
F-buttons
Select Drive
Displays the SELECT DRIVE popup (p. 203), where
you can switch the current drive.
Rename
Displays the EDIT NAME popup (p. 199), where you
can edit the name of the file or folder at which the
cursor is located.
Make Folder
Displays the EDIT NAME popup (p. 199), where you
can create a new folder inside the current folder.
Command
Displays the SELECT FILE COMMAND menu (p.
332).
DISK/USB
331