This document discusses different types of backup storage devices. It defines backup as copying computer data so it can be restored after data loss. There are three main types of backups: full, containing complete system images; incremental, saving changes since the last full or incremental backup; and differential, saving changes since the last full backup. Common backup storage devices include magnetic disks, tapes, hard disks, optical discs, solid state drives, network attached storage, and cloud storage. These devices differ in terms of capacity, cost, transfer speeds, security, and portability.

1. Backing Storage

2. Objectives
 To understand what a backup storage device is
 To understand and identify different types of backup
 To understand and identify different types of backup
storage devices, including magnetic & optical
 To understand the difference between the devices e.g.
 Capacity
 Transfer rates
 Cost
 Security

3. What is a backup
 A backup refers to the copying and archiving of computer
data so it may be used to restore the original after a data loss
event.

4. Types of Backup
 Full
 contains complete system images taken at one or more specific
points in time
 Incremental
 a full backup is made on one occasion and serves as the
reference point for an incremental backup set. After that, a
number of incremental backups are made after successive time
periods.
 Differential
 Differential backup saves the data that has changed since the
last full backup

5. Types of Backup Devices
 Magnetic Disk (3.5’’ Floppy, 5.25’’ Floppy)
 Magnetic tape
 Hard disk
 Optical storage (CD, DVD, Blu-ray)
 Solid State (USB Flash Drive, Memory cards, SSD)
 Network Attached Storage (NAS)
 Cloud

6. Differences
 All back up mediums have their differences, these are usually
relating to:
 Capacity
 Cost
 Transfer speeds
 Security
 Portability

7. Assessment (Part of P1 & M1)
 P1 Describe the different types of backup devices, identifying
their individual specifications in terms of:
 Capacity
 Cost
 Transfer speeds
 Security
 Portability
 M1 Compare the features and functions of each backup
devices, giving strengths and weaknesses. Give examples of
which might be relevant for home use / small business / large
businesses etc.