We've received many reports of customers that can successfully install Revit Content Libraries (the program) but the actual content files are not copied (or downloaded) to the local hard drive. While we have not been able to identify the underlying cause of this problem, we aim to mitigate the issue by making the Revit content files available via direct downloads on the following pages:
https://knowledge.autodesk.com/support/revit-products/downloads/caas/downloads/content/autodesk-revi...
https://knowledge.autodesk.com/support/revit-products/downloads/caas/downloads/content/autodesk-revi...
We are working on a separate page for the Revit 2018 content and hope to have it available in the near future. While waiting, you could download and use the Revit 2017 content files with the only drawback being the need to upgrade these files each time they are loaded.
Tony Michniewicz
Revit Software QA Analyst