If you're going to use Nicehash at all, only use the internal wallet option and then shoot it to Coinbase daily as previous poster mentions. DO NOT mine to an external wallet since they have payments for anything below 0.1 BTC on indefinite hold due to BTC's high transaction fee (they should allow people the option to pay the fee if they want anyway, but they haven't yet).
when switching to internal, you lose pending balance youve acrued to external right?