To make bootable USB media, use a Fedora Live image. Use either a Windows or Linux system to make the bootable USB media.
USB Image Writing is Nondestructive
Writing the Live image to the USB media is nondestructive. Any existing data on the media is not harmed.
It is always a good idea to back up important data before performing sensitive disk operations.
To begin, make sure there is sufficient free space available on the USB media. There is no need to repartition or reformat your media. It is always a good idea to back up important data before performing sensitive disk operations.