Need assistance backing up forex data servers

[Toney0198]

I'm new to forex and new at this work position as administrator. We use CommVault and BackupChain in my company and I am not sure how often I should back up their data and what to back up for how long. Are forex and trade archives important after say one year? How about transactions, do we need to archive them for many years?
How do you keep track of all your trades? If you use for example Microsoft Office, would you want to keep these docs for longer than one year?
I would like to gather as much info as possible and come up with recommendations for my manager as to how much storage space we will need in the future.
Thank you!