The Apple Time Capsule 2TB 802.11n Wi-Fi Router with Built-In HDD is a white external drive with a storage capacity of 2TB. It is compatible with Mac and features a 7200 RPM rotation speed, making it ideal for storing large amounts of data. This unit also includes a Blu-ray BD-R Dual Layer writable format and a 1 MB cache for efficient data processing. With its wireless and USB interfaces, this Apple product provides convenient storage solutions for a range of devices.