InfraWorks caches cloud models locally in order to improve performance and manage model history.
By default, the cloud model cache location is C:\Users...\Documents\Autodesk InfraWorks Models\Autodesk 360. You can change the default cloud model cache location in Application Options. For example, you may want to locate the cloud model cache directory on your D drive instead of the default C drive location.
You can review the cloud model cache location for any model from InfraWorks Home. Hover over the model status icon in the bottom right corner of a model tile and the tooltip will display the cloud model cache location.