I recently purchased a 2013 Mac mini. I'm installing a 1Tb HHD. Last night I cloned my mac HHD using ccc. After cloningthe used space on the drives differ by 10Gb. The original drive had 27Gb of used space and the clone drive only had 17Gb of used space. I did a recovery partition as well. Is this normal or should I erase the cloned drive and try it again? I wanted to swap drives before is started adding all my stuff to it. Thanks in advance.