External Hard Drive

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External Hard Drive
A typical external hard drive

An external hard drive is a portable device used to store data. They are just like the hard drives already in a computer except, as the name implies, they are external. They can be disconnected and reconnected at will. Typical external hard drive sizes range from 500GB to 3TB with more expensive ones ranging from 3TB to 4TB. External hard drives are useful for backing up data and for the use of keeping data in two locations in case of unforeseen computer crashes.

Using your External Hard Drive


For Mac users, it is very strongly recommended that you do not backup your data using Time Machine. If you purchase an external hard drive and plug it into your Mac, this window will pop up. You will need to select "Don't Use"


The next step will be properly formatting your external hard drive before backing up your data. To format your hard drive, within the spotlight search option in the top right corner of your desktop, type in "Disk Utility" and select it from the menu.