Recovering images from tape

I have media that shows images but no available data. For example in media device management > Media > Pool Name , there are 72 images showing, frozen media, 0 valid images. I thought that by freesing the media it would not allow any data expiration. This kind of seems true since it is showing that there are 72 images but not so much since it is showing 0 valid images. How do I move tha data from that media to another with a longer retention. Nothing shows up in the catalog search.

Thanks!