How to set up an intranet on hosthatch NVMe and Storage machine

Hi

I have NVMe and Storage machines in the same data center
I want to set up an intranet backup.
How to build an intranet
And what program to use for backup

Can the traffic of two machines be combined for billing use?

lsyncd
rsync
borgbackup
rclone

Which one is easy to use.?

thank you all

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