As a global leader in the PC market, IBM develops, manufactures and markets cutting-edge, reliable, high-quality PC products and value-added professional services that provide customers around the world with smarter ways to be productive and competitive.This FAStT600 option allows expansion beyond the FAStT600's internal 14 drives for greater storage capacity using the EXP700 Storage Expansion Unit. Supports expansion to up to 28 drives and up to 4TB of data.