I've created a second local wallet in my multibit. The first wallet is aimed for receiving and sending coins, while the second one is aimed to separate savings. Is there a way to transfer coins between these two local wallets without paying fees ? It is possible in a normal bank account but the fees here are really too big. Thanks for your help :)
You need to send the coins to an address in your second wallet. MultiBit maintains each wallet as a separate file on disk, so there is no interaction between them. One suggestion (which is how I handle this) is to wait until your wallet reaches a large enough amount and then make a single send request to your savings address. This bundles multiple input transactions into a single output transaction with a single fee.