I have a Trezor but I believe its the same thing for Ledger nano S. If the addresses start with 3, then I suggest moving your funds there. If they are like the ones available in Electrum (bc1) then Its better to wait for more people and services adopting it.
Electrum desktop install gives you the option to install it with SegWit addresses.
.... The problem is not all services support SegWit at the
moment, so you will have to choose between using legacy addresses for services that support the old addresses and then SegWit addresses for
the services/persons that will support that. The SegWit to SegWit tx's are a lot faster and cheaper.