30 TB hard drives coming. Moore's Law keeps cranking. Thanks to something called "heat-assisted magnetic recording (HAMR) technology". It works by temporarily heating the disk material just in the spot that's being written, and this allows writing to smaller regions at higher densities. It's tricky to do but apparently Seagate has mastered the technique. Apparently this technology was announced last June but volume production hasn't fully kicked in yet.
Seagate unveils Mozaic 3+ HDD platform as HAMR readies for volume ramp