How do i transfer my Xbox one profile to a USB?

Much like the comments have stated, there is 0 reason to save your profile to a USB,also as far as I am aware, there isn't even a way to do so.

If you want to move your account to a different system (maybe you bought a One-S) or play on a friend's console, all you need to do is login, then all of your info will simply automagically sync up. When your done at the friends house, you can lock up the account, delete it until next time, or just leave it as is depending on how much you trust them... Your home Xbox will resync everything you did on the other console once you login again.

The only way you could copy the profile is if you access the hard drive of the xbox offline through a computer or pc. Xbox One has removed that feature a long time ago because people could copy profiles to another Xbox and remove the passcode using hyperscript software.