My LR5 pointed to an external hard drive that failed. Now I need it to point to my backup hard drive. How I manage my collections is as follows: I use a Mac, I create a different catalog per shoot and with Finder I create 3 folders: RAW, PSD, JPEG. Using Finder I download all the RAW files to the RAW folder. Then I import them into LR5, I cull out the bad shots and work on the keepers. When done, I export them as PSDs to the second folder described above. As needed I export them into the JPEG. How do I be LR5 pointing to those folders on my backup drive? Please someone help.