While importing the images into the Lightroom you can change the destination folder.
may i know are you not able to change the destination while importing the images.
the problem is that an error message shows up as soon as I try to view any earlier imported files from my external Hard disc."My book Studio" LR says it now uses "Pictures" (the new mac program) instead. When clicking My Book studio from LR the error message shows up. "The Map/ Volumes/My Book Studio/Lightroombilder/2015 isn´t available." I think i´ll go crazy.
May i know are you able to access the location on finder.
open the finder and check are you able to go to the location.