I have a backup job of an exchange server. I need retention for as long as possible (currently set to the limit of 999 days) in case we need to restore old individual e-mails. A little over 2 years ago, I started out doing incremental backups with a weekly full backup. After a couple months, I changed it to a monthly full backup. Eventually, I realized the best use of disk space would be to switch to reverse incremental, which I've now been doing for a little over a year.
Now I've started getting warnings that the backup repository is down to 10% free disk space. It looks like a little more than 5 TB is taken up with the old full and incremental backups, prior to the reverse incremental. Can I safely move these somewhere else without hurting the backup job? And then hopefully I could move them back if I need to restore e-mail from that long ago? (I wish there was a way to convert the old files to reverse incremental and get rid of all the old full backups.)
I should mention that I'm using B&R Essentials 188.8.131.521 on Windows Server 2008 R2.