format
US /ˈfɔːr.mæt/
UK /ˈfɔːr.mæt/

1.
the way in which something is arranged or presented
:
•
The book was published in a new format.
•
Please submit your report in the specified format.
1.
2.
to prepare a storage medium (such as a hard disk or USB drive) for initial use, usually by erasing existing data and setting up a new file system
:
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I need to format my hard drive to reinstall the operating system.
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Be careful when you format a USB drive, as it will erase all data.