This article mentions generating screens by uploading a Sketch or PSD file. This method of syncing is being discontinued for existing customers effective August 14 and are unavailable to new customers. Please see the announcement
for more details. We strongly recommend that you start using Craft Sync now.
Screens are limited to 10 MB. Individual files can be up to 500 MB, and accounts (including Team accounts, as a whole) can hold up to 10 GB in the InVision Sync Mac app and when uploading or dragging/dropping files into InVision via your browser.
The 10 GB limit does not apply to Enterprise plans.