"To verify your (external) address with your account, you need to make a deposit from this address."
They basically saying I have to send from the same btc address that I want to withdraw too.
Can anyone explain how to do this please?
Thanks.
Wait, take a step back... Who's asking you to do this?
This is usually a scam trick!
When somebody asks you to send the money using an irreversible method that's semi-anonymous in order to get money from them, alarm bells should start going off.
Compare it to fiat money: if you meet a stranger you've never met on the corner of a street and he tells you to give hem a $100 bill and walk away with the promise he'll meet you at the same corner one day later and give you your $100 back + $500, but you have no way of identifying him or making sure he keeps his word... Would you do this?
if the answer is no, then why would you give a stranger on the internet money on a vague promise you cannot enforce in any way?