I left my tokens on Ledger/Trezor, what should I do?

If your ERC20 Theta Tokens were on a hardware wallet at the time of the snapshot, your mainnet Theta Tokens and Theta Fuel are safe but it will take a bit of extra work to access them on mainnet. You will need to either wait until Ledger/Trezor integrates the new Theta blockchain (working on it, but no ETA since they are back logged) or extract your private key from Ledger/Trezor and import it to the Theta web wallet (this requires some advanced cryptographic knowledge). But your tokens aren't lost, you just might not be able to access them immediately.