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Open Disk Management, right-click your drive, and select Format to start erasing it. Choose NTFS for the file system and uncheck quick format to ensure a complete format. Formatting deletes data but doesn't fully erase it, so use additional methods for a complete data wipe.
Formatting your computer means erasing all the data on the hard drive (s) and then reinstalling Windows or macOS for a fresh start. This can be useful if your computer isn't working right or you plan to sell it and don't want to risk someone recovering your data.
These are some of the best ways to format a hard drive or disk. Make sure to take a backup before formatting anything. Once the formatting is complete, then it cannot be recovered easily....
formatting (ˈfɔːmætɪŋ) n (Computer Science) the style of the format of a computer document