Which workflow in ArcGIS Pro is most efficient for loading feature classes from a personal geodatabase to a file geodatabase?

The most efficient workflow for loading feature classes from a personal geodatabase to a file geodatabase is to use the "Copy features" tool. This tool is specifically designed to create a copy of the selected features in a new location and can easily transfer data between different geodatabase formats, including personal and file geodatabases.

"Copy features" allows users to select one or more feature classes, and efficiently duplicates them in the desired file geodatabase without the need for additional steps or configurations. It handles the transfer seamlessly, preserving the attribute information and spatial data while ensuring that the data integrity is maintained.

Options like "Import Replica Schema" and "Import XML workspace document" are not suited for simple data transfer tasks between different geodatabase types. They cater to different functions such as managing replica workflows or schema differences, which are not necessary when merely copying feature classes. Meanwhile, "Feature Class To Feature Class" is also a potential choice for transferring data, but it is typically used for more complex scenarios where additional processing or transformations are needed, which can make it less efficient for a straightforward copy operation. Thus, "Copy features" stands out as the most direct and efficient method for this particular workflow.