Was unable to back up LR -to ext hard drive. Investigated hard drives (Lacie 2 TB for catalogue and 3 TB for photos) and 3 TB hard drive had a bad cable that caused file corruption. Replaced cable, backed up hard drive to new 2 TB Lacie hard drive, went back into LR and it doesn't recognize that I had any photos or catalogues now. I am at a loss .... I use a MacBook Pro also with a time capsule back up that started not working about the same time. any suggestions would be helpful. thank you.