Which tool is best for exporting features from a geodatabase to another file format?

The most suitable tool for exporting features from a geodatabase to another file format is the tool that allows for direct conversion and saving of geometries and attributes into various desired formats. This tool offers a straightforward approach for taking existing features and generating a new set outside of the geodatabase, facilitating tasks like data sharing or integration into different systems.

Copy Features provides this functionality seamlessly. It effectively duplicates features from a specified input layer and writes them to a new output feature class in the desired file format, thereby allowing users to carry their GIS data into different environments or file structures without loss of detail and accuracy. This makes it particularly useful for users who are working on data interchange or needing to work with simpler file formats like shapefiles or GeoJSON.

In contrast, the other tools listed do not serve this primary purpose as effectively. Export Data can be useful, but it is typically part of a more complex process involving selecting data from specific layers rather than serving as a direct export tool. Model Builder is often used for automating workflows and does not specialize in the task of directly exporting datasets. Field Calculator is focused on attribute manipulation rather than exporting features and would not suffice for the task of exporting a whole feature set to a new file format.