The 2016 MacBook Pro 15-inch has no official storage ceiling

There’s no official storage ceiling on the 2016 MacBook Pro 15-inch — Apple never published a hard limit. Users have successfully installed compatible third-party SSDs up to 2 TB and beyond. The real constraint is finding a drive that works with Apple’s proprietary connector and firmware quirks. Past a certain point, it’s less about the machine and more about what the SSD market offers.