Apple reversed its decision to only offer 1TB of storage space in December and quietly updated the Mac mini build-to-order options, adding an option for a 2TB Fusion Drive for an additional 100



From MacRumors:

Before the change, users could only choose a 1TB Fusion Drive or 1TB of PCIe-based flash storage. Though the return of a 2TB storage option will likely please some potential Mac mini buyers, the new 2014 machine has not been well received due to its soldered RAM and lack of a quad-core processor option.

  Late 2014 Mac Mini Gained Option for 2TB Fusion Drive in December