Universal Scene Description (.usd) import

USD (Universal Scene Description) is a file format developed by Pixar for interchanging 3D computer graphics scenes between digital content creation applications. USD is an extensible open-source file format. It is widely known in design, architecture, manufacture, animation and many other industries.

Import

To open, import or insert a file

From the File menu, click Open, Insert, or Import.
In the dialog box, select a supported file type.
Click Open and configure the settings.
When you open a non-3dm file and save the model, its filename will be the default 3dm filename.

More information about USD file format on the web