I am running PSE19 on a Win 10 system. Currently I have about 43000 pics. My system has 2 drives: 'C' is an SSD, 'D' is a 1 TB HD. My PSE19 is on drive 'D'. Recently I got a msg re backing up my catalog - an incremental backup would suffice. I noticed that my initial catalog was placed on 'C', but it was for PSE17 which I have never owned. Now I'm confused and not sure how to proceed.