Understanding how to download full data from Tableau Server while holding a license is a common point of confusion. By default, users with a Viewer site role are restricted to downloading only summary data , while the "Full Data" option remains unavailable or grayed out. The Role of Site Licenses and Permissions
If you have the appropriate license (Explorer or higher) and the necessary permissions set by your administrator, follow these steps to download data: Permissions, Site Roles, and Licenses - Tableau Help tableau server viewer download full data
These roles can be granted the permission to download full underlying data. How to Access the Download Options Understanding how to download full data from Tableau
Specifically designed for users who only need to consume and interact with data. They can download Summary Data (the aggregated numbers shown in a chart) but are always denied the Download Full Data capability. How to Access the Download Options Specifically designed
In the Tableau ecosystem, site roles act as a "ceiling" for what a user can do.