Hello all: Recently I bought an Intel NUC and I'm very happy with it. I'd put a a fast SSD in it, 970 Evo, but I don't want to store my pictures in this internal SSD because it will be filled sooner than later. What i want to do is the following: I have a 1TB Samsung T5 SSD that I can connect to one USB 3.1 Gen 2 of the NUC. This would be my daily working disk. Let's say this contains the pictures from the last two years. THis disk is as fast as an internal (SATA) SSD so I can work smoothly with my pictures. I have a 4TB Lacie USB 3.0 disk, magnetic spinning disk, so much slower than the Samsung. This would be my backup disk and would contain all the pictures I have taken since I bought my first digital camera 15 years ago. I also backup my pictures to 100GB BDs so if the disk is near full I can safely delete the oldest ones. I had set two catalogs, one for the daily working disk and another for the backup disk. Both are in the internal SSD, not in the removable disks. Is this right? After a shooting session I import the raw files from the camera card to the daily working disk and a copy is made to the backup disk. Then I disconnect the backup disk and start developing the pictures in the working disk. In this process pictures are rated, metadata is changed and are developed and get an .xmp file, when Lightroom is not enough I continue editing in Photoshop, so some PSD files that are not in the backup disk are generated, also some raw files are deleted because I decide it doesn't worth to keep them. When I'm finished working with the pictures (this can take months) I would like to copy all the changes I've made in the working disk (in the catalog and in the fliles themselves) to the back up disk. Sometimes I think I have finished but I come back to work with a picture so I have to repeat the process. How can I  do all this with Lightroom? ... View more