Switching to larger backup drives

I have a Windows 2012 R2 Essentials server with a 1 TB mirrored drive.  I also have four 1 TB backup drives that I rotate, with one off-site.
EDIT: I am using Windows Server Backup
However, my backup drives are almost full and I need to use larger drives.  So I bought three 3 TB drives.
My question is: if I do backup setup again with just the three 3TB drives, do I lose access to all the older data that was on the 1TB drives?  To guarantee backup integrity, should I instead do setup will all seven drives attached?
Thanks in advance for any answers.
- Grant

How many backups do you need? Windows Backup will maintain the amounts of backups automaticly, if it runs out of space.
How do you run your backup? Normal (schedueled backup) is done by one full backup, and the rest will incremental.
I would suggest you create a new schedule, with the new drives only taking backup of the mirror disks. If you take backup of all of it, it's double backed up..
Or, you should be able to simply add a drive to the current schedule..
Best Regards,
Jesper Vindum, Denmark
Systems Administrator
Help the forum: Monitor(alert) your threads and vote helpful replies or mark them as answer, if it helps solving your problem.

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