I have an external hard drive that I used on my windows laptop. Now that I have a mac it acts different. One difference is I can not drag and drop a folder with movies in it on the the ext hd from my mac. I get the circle with a slash through it. Is this because it is formatted to work with windows? How do I correct this? I tried using win 8 on parallels and it says I need permissions but I don't see that option to okay it. Can I get some help please? Thx.