So heres the deal. I have a few drives. two 1-terabytes and one 2-terabyte drives. I had time machine running backups on one drive. Then later I switched it to another drive. I need disk space so I dragged the backups from the first drive that no longer uses time machine into the trash. Now the computer won't empty the trash because it sees backup files in there. I tried moving the backups out of the trash onto the original drive. But it won't even do that.' What can I do?