The folder Pending Restore displays all that will be restored. The folder Pending Archive displays all that will be archived. Only one operation is permitted at any given time: you either restore or archive, you cannot do both simultaneously.
Verify Source Media validates all the media, which can be time consuming.
The Archived column from the Details view of the Media Panel displays either the last time the clip was successfully archived, or why it failed to archive.
These versions did not store resolutions and associated pixel aspect ratios, and the Default Resolutions table fills that gap.