Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for file transmission. In one aspect, a system includes at least one machine control system, having access to a first data storage; at least one service computer, having access to a second data storage; and a central computer having at least one virtual machine. The machine control system is connectable to the virtual machine via a first communication connection in a manner that files between the first data storage and a data storage, to which the virtual machine has access, are transmissible. The service computer is connectable to the virtual machine via a second communication connection, in a manner that the virtual machine can access the second data storage and can store there files of a transmission via the first communication connection or can read files for a transmission via the first communication connection.