Nextcloud is the next generation open source file storage and file synching platform. It’s similar to Dropbox, Google Drive and Microsoft OneDrive. The main difference is that you run the software on your own server. This is a perfect solution if you’re worried about mass surveillance. It’s safe enough to place on the cloud. Better yet, you can run it on your local network at home. It behaves somewhat similar to a NAS (Network Attached Storage) but with a better web interface, and a few more apps.
In addition, you can install the client software on your Desktop (PC, MAC and Linux) or to any mobile device (iOS, Android and Windows). The clients automatically sync data to the server software that’s installed on a Linux server. Files can also be accessed using WebDav as well. It has an online office, a video chat feature and Outlook email integration, but I’m not really interested with those additional features. I use it primarily for storage and file synching only. It works great by the way.
Give Nextcloud a try.