Collaboration means file storage, document management, video conferencing, shared event calendars, and things like that. As a rule, people tend to trust personal life and business to third-party services. However, there is an option to keep it all on your own server.
We choose [Nextcloud](https://nextcloud.com/) - free software for convenient scheduling and file storage.
To follow the steps below, you'll need to connect to the server via SSH with administrative rights. A basic understanding of the command line is beneficial ;)
## Synchronizing Nextcloud Across Different Devices
Download the [Nextcloud main app](https://nextcloud.com/install/#install-clients) (GNU/Linux, Windows, macOS, Android, iOS). It will help you synchronize files.
How to set up synchronization for contacts and calendar? Instructions for different systems and applications.
# How to Synchronize Nextcloud with an Android Smartphone?
1. Download the [DAVx⁵ app](https://www.davx5.com/download/) on your Android device from [F-Droid](https://f-droid.org/de/packages/at.bitfire.davdroid/) or the [Google Play Store](https://play.google.com/store/apps/details?id=at.bitfire.davdroid).
2. Open the app, and create a new account by tapping the "plus" button.
3. In the account creation menu, select the last option "Nextcloud".
4. The app will prompt you to enter the URL of your Nextcloud instance. The URL should look like: `https://cloud.YOUR.DOMAIN`.
5. A browser will open. You need to log into your Nextcloud account and grant access.
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6. Return to the DAVx⁵ app. For the name, enter the email address registered in your Nextcloud account settings.
7. In the "Contact group method" section, choose "Groups are categories of contacts".