Yes but there are caveates naturally because it all depends on how the disk was formatted. MACs use HSF/HSF+ natively and of course Windows can't read that format natively, they are FAT/NTFS/GPT based. If the drive is partitioned in MAC format then you will need to install a program that can read the drive in Windows like HSF Explorer. Or you could copy everything off of the drive and back into the MAC.

Amazon.com: Western Digital WD 3TB Black My Passport for Mac Portable External. For windows, WD Backup and downloadable Acronis True Image WD Edition for Windows. Read Quick and My Passports User Guides were no help. A WD My Passport formatted with Mac file system will be a dud on the Windows and vice-versa. Connect your Western Digital My Passport hard drive to your Windows PC through the USB cable. Wait till the Windows detects the external hard drive and configure it as an expansion drive.

Reformat the drive to something both can read, such as FAT32 or exFAT, and then copy the files back. *exfat supports files larger then the 4GB limit of FAT32.

Specifically designed for MAC users this WD My Passport for Mac Portable has 500GB/1TB/2TB capacity, USB 3.0 interface and password protection. This unit gives users the ability to add extra storage for music files, photos and videos. Formatted HFS+ Journaled for use with Mac OS and also compatible with Apple Time Machine. If users have a Windows Operating System the unit will need reformatting. Best photoshop for mac. The Pros: Performs well and is very convenient to use.

First time using it is made easier because of the pre-formatted MAC operating system and because it is USB powered. There is an automatic installation on-screen that the user just has to follow. It also comes with a 1-2-3--type illustration showing the setup in detail. Reformatting it to be used on a Windows system was easy using the drive management utility after download the updated driver from the WD website. The resources and instructions for using this on a PC can also easily be found online.

The Cons: The instructions and warranty information as well as the technical specifications are printed in very small font, which can be difficult for most people to read. The Bottom Line: The WD My Passport for Mac Portable is recommended for anyone using a MAC product that desires fast backups. It works on a Mac book Pro right out of the box and fits perfectly in a laptop bag for easy backups on the go. This is also perfect for those looking for an external hard drive with password and hardware encryption security.