I write my electrum private seed on the piece of paper and save it with me but i fear that someone near to me may read that paper and get access to the wallet. So i copied the wallet file on my usb and also write the seed in notepad in that usb.
There is no point in copying if someone finds out your seed because he can still access that seed concurrently.
Creating another copy is just for 2nd backup, not protecting you from thieves. To protect it, create 2 or 3 layers of security, not to create too many copied seed.