I upgraded from LR 5 to LR 6. In the resulting catalogue, one external drive I use is no longer listed. I checked through backup catalogues and I can't find this hard drive listed anywhere. However, I have over a years worth of images on this drive and have used it with LR 5 extensively. Is there a way to have LR search old catalogues for a particular device? Thanks in advance if you have any ideas on how I can recover this work.