I dont gave a Trezor or Ledger Nano yet. Which wallet would be the safest to keep my BTC if a hard fork occurs?
What people need to realise is that if a hard fork occurs... you are NOT going to lose your coins if you have access to your private keys.
If you have your private keys, you can import them into "LeftForkWallet"™ and get access to the "LeftForkCoins"™... and/or put them in the "RightForkWallet"™ and get access to the "RightForkCoins"™.
The only people who should be nervous are people who have their coins stored in Online Services like gambling sites, exchanges and a number of web wallets like Xapo and Coinbase etc
where you do NOT have access to the private keys or the seed/mnemonic used to restore the wallet. In those instances, your coins are effectively just a number in a database somewhere... the service holds the keys and will end up deciding which fork to follow... left, right or both... and how they want to give you those coins... or not give you
as I posted in another thread:
Simple test to see if your wallet is suitable for holding coins:
1. Does your wallet provide you with the private keys for all addresses contained in it?
Yes? Wallet is OK.
No? Wallet is not Ok.