We strongly recommend every miner to start using NiceHash internal wallet. Altcoin payments for NiceHash internal wallets are already in the works and will significantly reduce the cost of transactions and also help smaller miners to be paid more regularly!
Mining to NiceHash wallet or mining to an external wallet has different payment and fee schedules. Please note that the payment schedule plays a role in the fees applied to mining to the external wallet. Once you receive the mining payment to your NiceHash wallet, you can withdraw funds from NiceHash wallet at any time but please note that withdrawals are manually confirmed once per day between 10:00 AM - 1:00 PM CEST.
The following video primarily talks about payments and withdrawals, but we also explain the difference between an internal NiceHash wallet and external wallet: