Hello @user188478 ,
If you're exporting particularly large lists (such as all subscribed), it may take awhile for the CSV file to be generated. You can navigate to your Contact's Import/Export Activity page to download these recently generated files, and to see other recent contact activity you've performed.
Additionally, if you do an ALL contacts export, you can have one of the included criteria be Email Permission Status and Subscription Info.
See also:
Exporting contacts
Unsubscribed Contacts
... View more