Connecter 4 is an asset manager for 3dsmax. It comes with a free version with new improvements like a smart auto assign previews tool, more stacking options, a new view to see all external references and more.
The paid version includes a version control toolkit, pipeline management, and support for many cloud storages.
more info: https://blog.connecterapp.com/connecter-4-version-control-smarter-auto-assign-more-15e58b870995