5. Magnetic DiskAre simply circular plates that are fabricated with either a metal or a plastic or a magnetized material.6. Magnetic TapeIs simply a magnetic recording device that is covered with a plastic film. It is generally used for the backup of data. In the case of a magnetic tape, the access time for a computer is a little slower and therefore, it requires some amount of time for accessing the strip.Characteristics of Memory HierarchyCapacity: It is the global volume of information the memory can store. As we move from top to bottom in the Hierarchy, the capacity increases.Access Time: It is the time interval between the read/write request and the availability of the data. As we move from top to bottom in the Hierarchy, the access time increases.Performance: Earlier when the computer system was designed without a Memory Hierarchy design, the speed gap increased between the CPU registers and Main Memory due to a large difference in access time. This results in lower performance of the system and thus, enhancement was required. This enhancement was made in the form of Memory Hierarchy Design because of which the performance of the system increases. One of the most significant ways to increase system performance is minimizing how far down the memory hierarchy one has to go to manipulate data.Cost Per Bit: As we move from bottom to top in the Hierarchy, the cost per bit increases i.e. Internal Memory is costlier than External Memory.Advantages of Memory HierarchyIt helps in removing some destruction, and managing the memory in a better way.It helps in spreading the data all over the computer system.It saves the consumer’s price and time.