4TB LaCie d2 Professional USB 3.1 Type C. The latest d2 desktop drive massively expands capacity to up to 10TB for professional bandwidth-intensive creative applications, making the LaCie d2 Professional the perfect complement to SSD-based laptops and all-in-one computers with limited storage capacity. This professional desktop drive performs perfectly on Macs and PCs alike and also features Seagate Barracuda Pro enterprise-class hard drives for industry-leading performance and reliability.