Tallyplug is by default offline and runs within the network.
For online connectivity Tallyplug employs Pearnode Business Plaform connector. Hence a Pearnode Business license is required for remote operations like sync, backup, restore and sharing.
In case you do not want to employ this data sharing options you can always export the data and share it online via mail or whatsapp.
This exported file will be compatible for import with other Tallyplug installations anywhere.