One thing that this article does not mention (and the thing that I came here looking to find the answer) is the question of how long should backups be kept? How often should old backups be deleted? Backing up every week for several years leads to the size collection of backups going into the range of several gigabytes.―Jones.Nathan (talk) 17:18, 10 July 2016 (MDT)
I did not find anything in my looking on the forums for how long to keep a backup. I was just exploring this myself and I believe based on my reading that you should only need to keep 1+ months of backups. I say this referencing the statement located here. I would personally keep three months of data at minimum. Anyone else please feel free to update with better information!