I've never done anything but plug a HD in and get right to work. Now that I've got an Apple, I'm a total nervous Nellie... I just got a WD external hard drive that is FAT32. I understand that the Mac can read/write this format. Would you recommend that I change it to HFS+ or should I leave well enough alone? If I do reformat, I guess this is done through the erase tab in the disk utility? I have attached a screenshot. Do I select "465.8 GB WD" or "My Book" as the drive I'm reformatting? Also, it looks like I can select "erase" or "erase free space." Which am I doing? And I select the format that I want to change it to, not the format that it already is? Which of the options do I select (journaled, case-sensitive, etc.)? Finally, I am probably going to install Windows on the computer. Might it be better to leave as FAT32 since Mac and Windows can both read/write this format, so I could use one drive for both, rather than having two separate external HDs? Or would there be other issues with this approach? I know FAT32 isn't the best for either operating system... Am I overcomplicating this whole thing? Thank you very much as always!