Hello, I have a quick question about using a Windows-formatted flash drive in my Mac. My friend let me borrow his flash drive so I can save some pictures for my sister and then have them printed out at a local store (we're at college and our printers are just good enough for printing papers and she needs decent-quality pictures for her sorority). So before he gives it to me, he tells me to make sure that my Mac doesn't format his flash so he doesn't lose everything on it, but he had to go to class and didn't tell me how to prevent that. Help please? I don't want him to lose his stuff, and the bookstore is closed so I can't buy a new one.