I have 2 macs , a macbook pro and a Macpro. I use an external hard drive to backup everything from the MacPro using time machine. I have setup the laptop using the external drive as a source. My intention is to open files from the external HD (connected by USB)from the laptop , edit them and then save them and then when I move onto the other machine , restore from time machine to keep everything in sync. Seemed like a good idea except for some reason it says I dont have permission to save from the laptop to the external HD. Im confused about sharing (if thats the issue) but what I want is simple.....just let me have access to all files on both computers and the external HD , I want to be the only user and I want to globally make all file accessible to without any of this permissions nonsense. Any help will be much welcome as Im tearing my hair out .....why do they have to make it so complicated !