Do you want a good quality Nextcloud service with CardDav? NextFiles is a high quality , hight privacy german based cloud provider, a fast and secure Nextcloud service in a German data center with ISO 27001 certification.
Stream media files: Nextcloud works very well as an online media streaming server. It comes with a built-in music player, and the web interface and iOS apps happily played every video we file we threw at them. All videos previewed fine in Android, but in our tests the Android app was a little fussier with what media files it would play in full-screen mode. Curiously, we also encountered occasional problems in Android even when streaming content using an external player such as VLC.
Looking for a Dropbox alternative? Cloud storage isn’t a hard service to come by in recent times. However, some of these platforms come with unseen limitations. For instance, your data is never truly “private” when storing it with a larger platform. Given that companies like Google are rumored to have the authority to access its user’s data, this can raise red flags for many. Albeit when it comes to privacy, it’s not a subject that should be overlooked. The purpose of self-hosted cloud storage is not to prove its superiority, but rather provide a competitive alternative to Dropbox and Google Drive. And within this open source cloud storage solution, a way for users to have more control over their hosted data.
An additional problem is that only the contents of files are encrypted, not their name or folder structure. If you don’t store data on remote storage services, then it is much better to deploy per-file encryption manually before uploading to Nextcloud and/or use full disk encryption on the server drives (for example using dm-crypt or EncFS). Full disk encryption is fairly easy to implement with self-hosted cloud or self-managed cloud instances. If you have a fully-hosted account then this is out of your control, although it is something your provider may do anyway (so ask).
Nextcloud gives you access to all your files wherever you are and whatever device you use. The easy web interface allows you to share files with other users on your server, to create and send password protected public links, to let others upload files to your cloud and to get notifications on your phone and desktop when a user on another cloud server shares files directly with you. And you can do all these things from the desktop or mobile clients, too. The Nextcloud Calendar and Contacts apps allow you to store, sync and share your plans and contacts. You can share with users or groups on your server or sync the calendar or contacts with your devices and access them wherever you are. The Calendar and Contacts app feature: Easy to use interface, Private and shared calendars and addressbooks with permissions management, CalDAV and CardDAV sync with third party clients both on mobile and desktop (i.e with Thunderbird). Find additional info at Nextcloud like Dropbox.