How to make an analogue of Yandex.disk or mail.cloud on the local network?

Question

Cloud computing

Hello!
It is necessary to deploy a server on the local network, similar to yandex.disk or mail cloud. The main criterion, like yandex or mail, is to make access to files via links, such as docs.mydoman.ru\e848fjfgh38... from the Internet at normal speed, the channel allows. In short, for exchanging large volumes of files via the Internet. Ideally, you need free software.
Who can advise.
Thanks in advance

Answer 1

OwnCloud

Answer 2

Who can advise.

Synchronization

Answer 3

Perhaps BitTorrent Sync (Resilio) will do.
Synchronizes data using peer-to-peer technology.
https://getsync.com/