Nextcloud is a suite of client-server software for creating and using file hosting services. It is functionally similar to Dropbox, although Nextcloud is free and open-source, allowing anyone to install and operate it on a private server.
In contrast to proprietary services like Dropbox, the open architecture allows adding functionality to the server in form of applications and enables users to have full control of their data.
The original ownCloud developer Frank Karlitschek forked ownCloud and created Nextcloud, which continues to be actively developed by Karlitschek and other members of the original ownCloud team.
in the case of this time, I use openSUSE Leap 15.0 to build nextcloud on it, and I will explain briefly how I can build it and installing nextcloud steps above openSUSE Leap 15.0, which turns out to build nextcloud on your own computer is not too difficult, easy even for beginners though.
so we can build their own cloud file hosting, and that too is free to obtain and is an open source