A method, system and apparatus to seamlessly manage and access files across multiple devices in a network, comprising steps of maintaining a local database in each of the devices, synchronizing the local databases of the devices using transaction logs and sync controller, managing and accessing file among the devices using the database. The V-type engine 21 has a crank case 24 and a transmission mechanism, with a center line E of a V-bank being inclined forward. In one embodiment, a heat collector can be provided to enhance thermal responsiveness.