Disk space required for logs and archive (Firewall Analyzer)

Disk space required for logs and archive (Firewall Analyzer)

Hi, we have configured our firewall analyzer to receive logs from around 8 firewalls. The disk usage per day is around 50GB which means to hold logs for a month, we require 1.5TB. Now, if we use 1 month logs and 3 months archive option, what would be the estimated disk space required??