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Step 1
Open the "My Computer" window by clicking the "Start" button, and left clicking the "Computer" heading.
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Step 2
Locate your external hard drive you wish to erase among the system drives listed here.
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Step 3
Right-click the external hard drive's icon, and select the "Format" heading to open the disk formatting menu.
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Step 4
Click the "Start" button on this menu to begin the disc formatting process. Depending on the size of your disk, this may take several minutes or several hours.
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Step 5
Explore the external drive upon completion to ensure all data has been erased.












