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Difference amongst primary and secondary storage device

Describe difference amongst primary and secondary storage device?

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In primary storage device the storage capacity is restricted. It contains a volatile memory. In secondary storage device the storage capacity is large. It is a non-volatile memory. Primary devices: RAM / ROM. Secondary devices: Floppy disc / Hard disk.

Primary storage device is Ram in which the instructions are hold for temporary & secondary storage is hard disk floppy cds etc.

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