I was using lightroom and had access to all my catalogs. then it got stuck when I was trying to syncronize and add new photos to existing catalog. now, all the catelogs disappeared and it only asks me to import or export the thousands and thousands of images from my original photo files that I had already imported from. I decided to connect my back up to see if it looked different and the backup cannot find the catelogs either. by the way, all my photos and lr are on a seperate external hard drive. tried to look for it on the hard drive and on the computer and cant find it.
now, all the catelogs disappeared
What does this mean? How do you know they disappeared?
Please do a search, using your operating system's search feature, for all files whose name ends with .LRCAT and then open each one found by double-clicking on it to see if this is the catalog with your photos.