Steps
1
Click Download
After selecting files in the tree, click Download in the footer. The confirmation dialog lists counts, types, known size, and destination.
2
Confirm the collection
Review Save to and any unverified-link warning, then confirm. Files are saved under Downloads in folders based on the site and collection.
3
Open the results
Use Open folder to inspect the files or open the offline library.html. Retry failed can retry failures; skipped files can be downloaded again if needed.