Xbox 360 Horizon Help Please

Hello everyone theres something i’d like to ask that i want to transfer my god (games on demand) format games to usb. First thing is that before plugging my usb into computer do i have to plug my usb in xbox for it to detect it?. Second That all i have to do is to transfer the file that is stf or something e.g. c:/game/415607E6/00007000/the file…
There are two things one is .data folder and other is a file do i have to just drag that file to the games folder through horizon? and it will be automatically installed and i will be able to copy the game to xbox’s hdd?

And Thanks in advance for help…