SUNSUNNY

Dear Sir/Mam I am downloading USB Multiboot from last 3 days but this not working . i am facing error while proceeding to second step when i enter 2 in CMD to select my USB which is of 4 gb it shows error ******F HAS NOT FAT FAT32 OR NTFS FORMAT AND IS NOT VALID ****** where F is USB drive kindly send USB Multiboot 10 software on my mail id , and also tell me the way how to solve this error do the needful