Bradlo

Hi guys, New here but ive got a problem and ive no idea how to fix it! (Despite google's searches...) Ive got in my PC a 1TB hard drive... Ive recently started to run out of room with my photography business files... So ive gone out and bought a second hard drive, this time 2TB to put along side my current one... Ive plugged it in and set it up with formatting (Formatted to drive B:) but whenever i move items onto the new hard drive it COPIES them onto it (So the original file is still where it was and now there is two copies of the files in different places) I only want files to be MOVED onto the new hard drive. If i drag files from the B: Drive and move them to the (lets say for now) desktop, it COPIES them from the B drive onto the desktop, but i want it to MOVE them just like my C drive does... Any ideas? Thanks in advance!!