My Passport Ultra WDBFTM0040BBL-WESN Features: Innovative style with refined metal cover USB-C ready, USB 3.0 compatible Automatic backup and password protection Social media and cloud storage import Up to 4TB capacity Easy to use 3-year limited warranty Specifications: System Requirements Windows® 10, 8.1 or 7 Downloadable NTFS driver to read⁄write on macOS. Reformatting required to use Time Machine on macOS. Compatibility may vary depending on user’s hardware configuration and operating system. Capacity 4TB Interface USB-C ready, USB 3.0 compatible Additional Details Innovative Style and Function Included WD Discovery™ software for social media and cloud storage import, backup and password protection 3-year limited warranty Package Includes My Passport Ultra Portable Storage USB-C™ cable with USB 3.0 adapter WD Discovery™ software for WD Backup™ , and WD Drive Utilities™ Quick install guide