The WD 20TB Elements USB 3.0 3.5" Desktop External Hard Drive in Black is a high-capacity external drive designed for use with various devices such as iPhones, laptops, PCs, and more. With a sleek design and fast transfer rates, this HDD from Western Digital offers plug-and-play simplicity and USB 3.0 compatibility. It is formatted for Windows 10+ and features WD quality both inside and out, making it a reliable choice for expanding storage capacity and improving PC performance. The product also comes with a California Prop 65 warning due to potential cancer and reproductive harm.