I am new to dual boot systems, I was running win7 and installed ubuntu 12.04 from a usb key using UNetbootin. I chose the option to have a dual boot installation so I get a screen that asks which system I want when I start up. It has worked fine so far.
My question is... how does this system really work? From Ubuntu I can see and access everything in my Win7 folders. But when I run Win7, I see no indication of where the Ubuntu files are if I search using windows explorer. Where are they? Should I be able to access the Ubuntu files from Win7 like I can Win7 files from Ubuntu?
If I have an external hard drive that I only use about 1/3 of for backup of Win7 files, could I have installed ubuntu on this drive so it is entirely contained on the external drive so I don't have top worry about any interference between the 2 OSs ? Should this be a concern at all?