I'm switching from a Mac to a PC. When I open Lightroom on my Mac, all images are there and all folders show up. When I go to open the same catalog on my PC, all images are labeled as missing and none of the folders show. When I try to find missing photos to re-link, Lightroom will only find 1 image despite others being in the same folder.
I have all my images on an SSD drive that I work off of.
Images are currently organized into subfolders, most by month/year.
Windows address drives with letters and MacOS uses Drive names. So the LrC Catalog is looking for images on a drive that has a Name and not just a Letter.
You will need to use one of these links to Re-Connect the catalog file to your images.
I also suggest you manually Assign a Drive Letter to that external SSD before you do the Re-Connecting.
Manually assigning a Drive letter will also stop that external drive from getting a different letter if you connect a different drive first then connect the drive that has your images on it. Google Manually assign a drive letter in Windows 10 for instructions to do that.