One HDA (as pictured) cost approximately $50,000, weighed 64 pounds, and the set was stored in the largest cabinet ever used for disks ... 16 TB 3.5-inch Seagate hard drive off the shelf, which ...

By 1981, Apple introduced its first hard drive known as the "ProFile" which first offered 5MB of storage for $3,499 and was small enough to sit on top of the Apple II, III and Lisa computers.