The BTC withdrawal fee in Binance (and pretty much every other exchange) is 0.0005 BTC - very high. However, if you do the withdrawal over their Binance network then the fee is only 0.0000014 BTC (a mere fraction!). Question is, can that network be used to withdraw "pure" BTC? How? The address I have on my (Trezor) cold wallet is a SegWit address which apparently doesn't fit the criteria.
Also, if it's stored in a separate network, does that mean that I'll only be able to sell my BTC via Binance?