To help you review the content, here are common ways to identify what that specific file might be: Common Sources for "G4" Filenames
: Many generic or "G-Sensor" equipped dashcams use a "G" prefix to denote protected files (videos recorded during an impact or sudden braking). g4_0139.mp4
: Right-click the file and select Properties (Windows) or Get Info (Mac). Look at the "Origin" or "Camera" section to see what device created it. To help you review the content, here are
: GoPro often uses a naming convention like GH010139.mp4 or GX010139.mp4 . If your file is g4_0139 , it may be a renamed clip or from a specific mobile app export. : GoPro often uses a naming convention like GH010139
: The "Date Created" timestamp is the best way to remember where you were or what you were filming at that time. Check File Size :