A new external hard drive or a USB flash drive that you just bought can be used with both Mac and PC, but not always straight out of the box because most of them (external hard drives or USB flash drive) are sold in NTFS format, which is fully compatible only with Windows. Everyone these days has an external media like a flash drive or an external hard drive which they use to expand their storage space, or transfer files and folder between two computers or to keep some personal or confidential documents separate from the computer.
