In Boot Menu, there are options : Hard Drive, CD Rom, Floopy, Usb fdd, Usb Zip, Legacy Lan. But in the hard drive sections, there is something and there is a option : Other Drive(something like thay written there)

What is the difference between USB CD and USB FDD? Only the option that includes the word “USB” is a USB option. FDD is a floppy disc drive, CD ROM is a CD drive, and HDD is a hard drive. How do I boot from USB FDD? Go into the BIOS, and go to the page that determines the boot order.

You would need to get the flash drive formmatted as a floppy again (FDD) or try selecting that option in the BIOS. Note that most current computers don't use the "USB ###" type options (FDD, HDD, ZIP, etc.). Instead, they recongize the flash drive as a hard drive device.
USB-FDD "Unsupported" In summary: Generally speaking, if your system BIOS supports the USB-HDD boot option, it should boot Linux from a large capacity USB flash drive. (a BIOS that supports USB-HDD automatically detects the geometry of the USB Flash drive)
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usb cd vs usb fdd