An MMV file is a firmware file used to update Magnex products, such as the DJ-Book 900 data storage device. It contains a firmware update for a Magnex device in order to make it work more efficiently, whether it be compatibility with a new operating system or new media.
MMV files are not meant to be opened on a computer. They should be installed on a Magnex device. In order to install an MMV firmware file onto your Magnex device, you need to first download the file from the Magnex website. Then, connect your device to your computer using a USB connection and transfer the MMV file onto your device.
NOTE: Magnex produces various electronic devices, including video recorders, portable audio players, and DVD players.