I am totally frustrated. I have used LR for years without problem until the last few months. I have had folders disappear from my catalog. I import the photos from my card onto my hard drive using the LR import function. I then rate my photos, put some in collections, use keywords and do basic processing. However when I come back later -- the folder and photos are no longer in the catalog or anywhere in LR. The photos remain on my hard drive in the same folder that I copied them to originally. I can import them again into LR but lose all the editing, cataloging etc. that I did the first time. This has happened periodically over the past few months. Tonight, I was importing some new photos and realized that 13 folders and hundreds of photos that I took between 6/14 and 8/6 were missing from the catalog and LR but are right where they are supposed to be on my hard drive. This is not a problem with linking a folder in LR to the folder on the hard drive -- the folder and photos are not anywhere in the LR catalog.. I have no idea how to resolve this problem. I have no idea how to resolve this problem. Any ideas? Help?
Do a search of your drive and see how many catalogs are on it. You would search for *.lrcat. Sounds more like you have multiple catalogs and or you are using some type of Auto Backup system and for some reason LR defaults to one of the older catalog backups.
It is either that or the catalog is being corrupted which means you have a hardware problem. Could be the hard drive or RAM.
Thank you for the help. I did have multiple catalogs. When I moved from LR5 to Lightroom CC it created a new catalog -- and then for some reason opened the old LR 5 catalog. I understand now and should be able to avoid that problem.