Hi @l3gacy304,
Harmony (ONE) is an Ethereum Virtual Machine (EVM) token. It is supported on Trezor in Firmware but you have to use a third party software, like Metamask, to connect it with your Trezor.
See the video in this thread:
Basically, you –
- Install the Metamask plugin in either Firefox or Chrome browser,
- Connect your Trezor to Metamask,
- Connect to Harmony at Chainlist.org,
- Use Metamask to transfer Harmony tokens to your Trezor.