I have lightroom 5 and have used it for some years. Today while processing photos, I was importing a new set of photos in library mode when the computer stopped the import for last of disc space. When I corrected the problem all my photos, everyone of them including ones I had previously saved plus the photos on the external hard drive I was imposing from have been lost! the previously imported photos appear as dark grey, there are a couple thousand of them plus a few hundred on the external hard drive, all unavailable. I have gone through the lost photo program and lost file program but it does not change things unless I do it one by one and even then they cannot be saved because my hard drives are locked. What can I do, need help.