LR 5 no longer recognizes my La Cie HD.My photos are stored on the La Cie. I loaded images directly on to my Mac pro HD when my La Cie was not available. Since that time, LR does not see my external drive.
Where are you looking in Lightroom (be very specific) that doesn't show this drive?
I expect the external HD to appear in the left hand column in the library
Retrieving data ...