This is extremely handy if you use a Mac and Windows operating system because you’ll be able to cross between both platforms and use your USB on anyone. When you do format a hard drive, you’ll be able to access your data, media and files across any operating system. Without formatting the drive, you won’t be able to use your hard drive across different operating systems. You can format an external hard drive or USB so that it’s compatible for both your Mac and your Windows PC.
