Backup Exec 2014 restore Deduplication Storage information

Hi

I have Backup Exec 2014 installed in Windows 2008 R2, I need to backup Windows 2012 R2 DC and I have to upgrade Windows 2008 R2 to Windows 2012 R2.

In this case, I want to take to reorganize my RAID and I need to save the 7TB of backups in deduplication folder and next, when I Install Windows 2012 R2 and Backup Exec 2014, I know how to recover the database, but not the content of deduplication storage.

What is the best way to save and retrieve information?

Thanks