How does unity3d import unitypackage downloaded from the Internet?

 

Recently, unity started to download some resources from the Internet. Some resources from asset> Import package> import custom package will crash.

 

You put the downloaded package in editor \ standard packages, and press Ctrl + 9 to enter asset store. When the page is loaded, click the one behind the house, there is a small triangle down, you can see the package you downloaded, click Import.

 

In addition, the packages downloaded from asset store are stored in: C: \ Users \ Administrator \ appdata \ roaming \ unity \ asset store \