There is BTC in the account, but the balance of the address on the blockchain is 0

I originally had 0.4btc. After transferring 0.2btc, I found that there was 0.2btc in my account in trezor, but when I checked it on the blockchain, the 0.2btc was transferred to another address and the balance of my address is 0 on the blockchain. Why is this? Is it the normal collection of trezor on the blockchain? Thanks.

Hello @Jinxruri, what you see is normal behavior. The 0.2 BTC was sent to a change address. See this thread for explanation.