Sending Cardano from Binance to yoroi wallet

Hi.

I don’t know much about trading and blockchain but I’ve got a question.

I have got some ADA on my binance account. i’d like to send it to my ledger nano s where i have rest of my ada.

But i found out one thing. When my ledger is not connected i cant send any ada from my yoroi wallet but still i can send ada for EXAMPLE from my deadalus wallet to yoroi.

so when i can be sure that all my ada are on ledger not on yoroi? Its very confusing, hope someone can help me