I've recently added an SSD drive to my Macbook, and I'm using my HDD to store my files.
Sometimes I want to move a file from my HDD to my SSD though. Whenever I try to drag it, Finder only allows me to copy rather than move.
I've set the permission of both the sending and the receiving folders to Read and Write for my user, but that did not help. When I try to
mv using the Terminal it does work without superuser powers.