Just a couple of questions for some of you tech savvy guys. I know that High Sierra will work on my mid 2010 MacBook Pro, however, i need to know if it will effect the hard drive partition that i made for my Windows 10. Also, please explain to me, in plain English please, how High Sierra will effect my external hard drive that i use for my Time Machine back-ups with regards to re-formatting the drive. Thanks, and i really appreciate any answers that you guys could give me.