Sony DCR-PC115 Operating Instructions Manual page 146

Viewing images using computer
Image file storage destinations and image files
Image files recorded with your camcorder are grouped in folders by recording mode.
The meanings of the file names are as follows. ssss stands for any number within
the range from 0001 to 9999.
For Windows Me users
(The drive recognizing the camera is [E:].)
Folder
100msdcf
Moml0001
146
Folder containing still image data
Folder containing moving picture data
File
DSC0ssss.JPG
MOV0ssss.MPG
Meaning
Still image file
Moving picture file