cpanel backups

hi everyone. recently i start with new server which has windows server 2012 R2 and inside it hyper-v has been activated wich has centos 7 and all the company web site is running on this centos server. furthermore, WHM is running on this centos server and ever single site has their own cpanel so i face with serious problem about how can mange this sites backup. as far as i know i can make full backup on cpanel but it made larg files about 6 gig per site and is impossible to download every single one . on the other hand we have 2TB hard on our windows server and it would be amazing if i find way to internal transport between centos and windows server to transport these files to storage and dont use my network traffic on site because it has monthly limit. i would appreciated if you provide me with a solution.