Question

91 Why does a computer copy files from
the secondary storage þrimary
storage
to the​

Answer 1

Answer:

The Benefits of Secondary Storage 

Picture, if you can, how many filing-cabinet drawers would be required to hold the millions of files of, say, tax records kept by the Internal Revenue Service or historical employee records kept by General Motors. The record storage rooms would have to be enormous. Computers, in contrast, permit storage on tape or disk in extremely compressed form. Storage capacity is unquestionably one of the most valuable assets of the computer. 

Secondary storage, sometimes called auxiliary storage, is storage separate from the computer itself, where you can store software and data on a semi permanent basis. Secondary storage is necessary because memory, or primary storage, can be used only temporarily. If you are sharing your computer, you must yield memory to someone else after your program runs; if you are not sharing your computer, your programs and data will disappear from memory when you turn off the computer. However, you probably want to store the data you have used or the information you have derived from processing; that is why secondary storage is needed. Furthermore, memory is limited in size, whereas secondary storage media can store as much data as necessary. Keep in mind the characteristics of the memory hierarchy that were described in the section on the CPU and memory: 

StorageSpeedCapacityRelative Cost ($)Permanent?RegistersFastestLowestHighestNoRAMVery FastLow/ModerateHighNoFloppy DiskVery SlowLowLowYesHard DiskModerateVery HighVery LowYes