Solution for backup deduplication storage

Hi all,

We are using old version of BE and using B2D method to backup all our server, then move the folder to 2 more external hard disk for our offsite backup monthly before.

Now, we upgraded to BE2012 and using deduplication storage to backup all our server to enjoy the benefit of deduplication.

But is it any possible way to backup our deduplication storage (around 6 -7 TB) to the external hard disk (2 x 4TB) for our offsite backup just like before?

Thanks in advance