In primary storage device the storage capacity is limited. 
It has a volatile memory. In secondary storage device the 
storage capacity is larger. It is a nonvolatile memory. 
Primary devices are: RAM / ROM. 
Secondary devices are: Floppy disc / Hard disk

name two resources you can use to complete secondary 
research ?

PRIMARY STORAGE DEVICES            SECONDARY STORAGE DEVICES

1.These devices are tempo-      1.These devices are permanent.
rary.                       
2.These devices are expensive.  2.These are cheaper.
3.These devices are faster,     3.These devices Computers via 
therefore expensive.            cables,and slow, therefore 
                                cheaper.
4.These devices have less       4.These devices have high 
storage capacity.               storage capacity.
5.These devices refer to RAM.   5.These devices refer to FDD