Keep the materials you want.
Temporary generation results and permanently saved library items are different.
On this page
Save the selected material
Save keeps the selected material in your private account library without generating again. It does not save an entire pack; select and save each result you want to keep.
Unsaved results have a recovery window
Unsaved texture-based results remain available for up to 24 hours. Account → Materials shows available temporary results and their expiry. Save them before the maps expire.
Leaving the page does not turn a temporary result into a permanent save. Once its files expire, the original maps cannot be recovered by opening the old link.