Casio BE-300 Listening to music on CASSIOPEIA - Manual (Page 8)

[ Listening to music on CASSIOPEIA ]
(4) The "Folder Synchronization Settings" window will reappear. Click the "Music"
checkbox to place a checkmark in it, and then click [OK]. The settings are complete
for transferring music files.
(5) Click the [Synchronize] button (shown in the red circle below), and the folders that
did not already exist when they were set in Step 3 will be automatically created.
(Initial setting --> C:¥CASSIOPEIA¥Music)