You can get aggregated reports for network and client usage on the HiveManager 6 dashboard for longer durations. The actual retention varies by the amount of clients and the disk space you have. If you get a 500 GB disk or larger than you can get reports up to 1 year.
Please note that per client records are governed by a max setting within Report Settings. (Go to Reports tab > Reports Settings > Device report). These reports typically will be within weeks.
Summary reports on the dashboard are available much longer up to year forweekly aggregated statistics.