LaCie has redefined a proven design with the new d2. Thunderbolt 2, USB 3.0, and a professional Seagate 6 TB 7200 RPM hard disk, the LaCie d2 delivers superb performance for heavy data users. It's even possible to boost speeds to up to 1150 MB/s and add 128 GB of SSD storage by installing the LaCie d2 SSD Upgrade (sold separately). Additionally, the LaCie d2 an innovative all aluminum unibody enclosure for incredible durability and low vibration. Digital Library Storage Huge capacity and high speeds make this product a perfect solution for storing and browsing a massive RAW Adobe Lightroom library.