In assistance of the first magnetic disc data carrier, it was possible to bring several magnetic discs into service and replace them in an easy and fast way. The pictured magnetic disc data carrier 1316 from IBM got as many as ten 14" storage units and could save till 2 million alphanumeric characters. It got a date rate out of 69 kZ/s (kilocharakters per second, engl. kilocharakters per second) and a average access time by 150 ms (milliseconds) In comparision: modern hard disc drives could store 3 TB (TeraByte) data with a dimension of 3,5 " (inches).