Making a windows 10 bootable USB drive.

I need to make a bootable USB with windows 10 on it for another laptop without an OS. The only resources I have are macs. I have a 32 bit windows 10 ISO and 8, 16, and 32 gb flash drives. I tried it with all of them and it says I do not have enough space on the drives although I formatted them beforehand. I have been using boot camp assistant and disk utility for this, but I have seen some people using terminal and typing the code in manually. I have been formatting the drives to MS-DOS (FAT) and the scheme is master boot record. Please let me know what I have been doing wrong. Thank you :)