We have been keeping our Browser Download files in the 4 GB range. To have a better user experience for 2016 products, the downloads now have a max size limit of 2 GB. This means that you need to download more parts but hopefully, it will not get corrupted.
In summary, all the parts should be 2 GB in size except for the LAST part.
TIP: When choosing a browser download from the Autodesk Manage site, you may need to disable pop-up blockers because the download has several parts in it.