Technical Graduate, Backup Case Study

Hi there forum!

Basically, i have been given a backup case study within my new job and i'm looking for any advice or guides that you guys can provide.

The case study is very broad and doesn't include many specifications, so make assumptions where you see fit.

It is written as follows:

"Random PLC" has 150 users spread over three separate sites, 100 users in the head office and two other offices of 25 users each.

At the moment each office has a server with a backup device attached and each office is responsible for its own backups and backup policy. Management has to decided to implement a central policy for the replication of data back to the head office and then centralize backups.

At the moment the head office produces 300gb of data a week and the other two offices produce 200gb of data a week each. each office already owns a LT03 tape drive. What solution would you propose to cetralise and consolidate their backups?

Like i said, ANY help would be appriciated and patronise as much as you want.

Thank you in advance.