if .002 BTC is the fee of Cryptopia's BTC withdraw fee, does it include also BTC transfer fee? Or the BTC transfer fee is separate fee?
So which one is correct for Cryptopia:
withdraw fee = .002 BTC = (BTC withdraw fee + BTC transfer fee wallet to wallet)
or
withdraw fee = .002 BTC = (BTC withdraw fee - BTC transfer fee wallet to wallet)
Yes it includes everything. Technically they aren't actually charging any withdrawal fees but they are actually just charging you what they pay on average for a withdrawal attempt, aka what they pay to miners to get a prioritised transaction.
They don't have a percentage withdrawal fee, either.
Quite straightforward, really. Take whatever amount you are planning on deducting from your account, subtract 0.002 BTC, and you get the amount you'll get.