I have spent hours trying to fix this problem. LR stopped reading my external drive which houses all of my photos. What can I do?
Well, we need a lot more details than that to figure out what to do.
Like, for example, we would need to know what exactly do you see on your screen, and is there an error message (if so, state it word-for-word). And we also need to know the information requested here: FAQ: What information should I provide when posting, or What do you need to know to solve my issue?