next.Hessenbox Apps
Using the various next.hessenbox apps, you can synchronize data between next.hessenbox and your computers and mobile devices. Because next.hessenbox is based on the Nextcloud product, the Nextcloud desktop and mobile clients are used. You can download them here for Windows, macOS, Linux, iOS, and Android.
Instructions for the desktop clients are also available on the official Nextcloud website in various languages. You can set your preferred language at the bottom left of the page.