I recently purchased a 4TB External My Passport and created a new lightroom catalog on it as well as started loading my raw files. That was this afternoon and it was working well, then this evening, I sat down to start more work and when I clicked on my external hard drive, there is NO DATA AT ALL! I decided to give the computer a restart and then the data reappeared. It has since done this twice now. I’m afraid to continue with my work incase it doesn’t save properly. I can’t believe my files would just disappear and then re-appear once I restared my computer. I might add that I recently updated to High Sierra and it’s been a pain Any help or suggestions are much appreciated!