Hi all I am looking for some advice. I am planning to move my iTunes Library and iPhoto Library and all my primary file storage to an external 3TB USB3 drive formatted in exFat so if my Mac fails I can connect it to my Windows server and retrieve my data. I made a test copy of my files to make sure everything worked and I noticed something interesting. When I look at the properties of my new directory on the exFat drive it tells me it is 741 GB but when I look at the properties of the same directory on the old Mac OS Extended Journaled Volume it tells me the size is 634 GB for the exact same amount of files. Any idea why there is a 100GB difference for the same amount of files? Does exFat store the files differently for some reason?