Strategy to Backup Existing Data/Continuing Data

Hi,

I am new to BackupExec. We are a R&D testing lab. We need to keep our data for ever. I am trying to figure out a strategy to backup our existing data of about 600 GB, along with additional data as time progress's. We could go for a week with no new data, and then add to it daily for a month or two, etc.

Our setup is Backup Exex 2012 SP3, on Windows Server 2008R2, with a LTO-6 tape library.

Thanks,

Lee