Final answer:
The terabyte (TB) has the most storage capacity, followed by the gigabyte (GB), the megabyte (MB), and the kilobyte (KB).
Step-by-step explanation:
The unit with the most storage capacity is the terabyte (TB), which is equivalent to 1024 gigabytes (GB). One GB, in turn, equals 1024 megabytes (MB), and one MB equals 1024 kilobytes (KB).