jwn wrote:
you can redirect where you Photo looks for the Photo library to the outboard hard drive. so no drag and drop necessary. I did this with the Itunes/mp3 files to free up more space on the iMac drive for photos. go to the support section on Apple site and search.
Yes, you can simply move your entire existing library (which is one large file) to new location, and then set that location as default for Photos app. I just recently did that in my MacBook Pro after removing an optical drive and installing 2TB HDD in a bracket that fits right there. No one burns cd's or dvd's anymore anyway... :-) If I find simple instructions how to do it I will post the link in comments...