Downloading the Nextcloud client applications.
Login to CoZa.cloud and select the user profile icon on the right of the screen.
It should have the capital letter of the first charterer from your user name.
Select the settings options to show your Nextcloud account settings and the settings menu on the left. Select the Mobile & Desktop option.
From here you can download the desktop or mobile sync client of your choice. To sync across devices.
You will also find information on how to connect your contacts and calendars to CoZa.cloud and download Nextcloud Talk for your mobile.