In order to use Back to Mac, I need to turn on Screen and File Sharing. I want to make sure that turning these on will not compromise the security of my Macs. I did not change any of the default settings that were enabled when I turned thees on. 1. What settings should I be concerned with looking into for security reasons? 2. Does Screen Sharing and File Sharing need to be turned on on both Macs or only on one of them? 3. I also just noticed that when I went to Go > Network that I am able to access all of the files on my other Mac. Is this part of Back to Mac, or is this on now because I turned on File Sharing? Thanks in advance.