Hello, I would like to make a backup of my data from old MacBook. The version of OS is: 10.5.4 os x I would like to copy the data to the external harddrive and encrypt it. Then I would like to be able to mount this drive to this old 10.5.4 os x as well as to my new machine which has installed 10.10.2 yosemite. Is it possible? What would be the best way to do that? Is SAMSUNG STSHX-M101TCB a good choice?