Is there any way I can see if there's any more funds inside my Trezor? I remember, I already transferred out all of my funds from this hardware wallet, but I just want to be sure.
Like there's a way without buying again a Trezor Model One?
If you've already transferred your balance and just want to be sure, you can take your seed and open your wallet in another wallet
Electrum for example
https://electrum.org/How many words are in your seed?