Default High download values

Hi! I have a big problem on my nexus 4 with cyanogen mod.
Everytime i turn on my wireless or mobile data connection i have google backup transport downloading high amounts of data (dont know why, or what), but it's getting my mobile data plan over.
I have seen that was that process cause i installed 3g watchdog and showed me that 1 google play service is using the connection and then after that, when i clicked on more details i have that process name.
Can anyone help me? I'm getting a little crazy on this.