What do you mean transferring files, though?
1) You can simply download your profile onto the second console, which will carry over your achievements, gamer pic, and profile details.
2)If you want access to your game saves, then I suggest copying your saves from your first console onto the Cloud. Then you'll have access to them on the second console. Otherwise copy them to a USB and move them onto the second console.
3) If you have any marketplace purchases (games, DLC, etc.) you can download them onto the second console, but if you wish to access them while offline, or share them with anyone on that console, you'll need to do a licence transfer. If not, don't worry about it.