You can increase the DaysBeforeCacheCleanup. Determine the number of days after which any 3D .Binz model files remaining in the viewDir cache are deleted. When a new model or a version of a model is uploaded, it is automatically decompressed into a cached area in the viewDir folder to be viewed. However, if each file is decompressed for every file operation, this can impact your systems performance. Setting a time period that a 3D model is persisted in the viewDir cache can help users view the model faster. Hexagon recommends you set the period of days to be longer than the frequency at which the 3D model is updated. For example, if you expect a weekly 3D model upload from a contractor, set this to 8 days. If your model is essentially static, you can set this to 365 days.
Files remaining in the cached area of the viewDir folder are not deleted by the DaysBeforeCleanup setting. For more information, see File Service Settings node properties.