The WD 4TB My Passport Portable External HDD is a sleek black device with a compact 2.5-inch form factor, making it easy to carry around for on-the-go data storage and backup. It features a USB 3.0 interface for fast data transfer and a high rotation speed of 5400 RPM for efficient file processing. With a storage capacity of 4TB, this portable hard drive offers ample space for storing large files. Additionally, it is equipped with a Blu-ray BD-R writable format and a manufacturer warranty of 3 years, ensuring reliability and longevity. Ideal for users who need portable and high-capacity storage solutions.