If my Trezor One wallet firmware is outdated (more than a year and a half), do I have to update all subsequent versions or can I just do it with the latest or most recent version? In the latter case, how do I fiand and update each version sequentially? does Trezor Suite show me step-by-step instructions? Is there any tutorial? Thank´s
you do not need to update to subsequent versions, you can update right to the latest one (you will be prompted to update to the latest one in Trezor Suite). Remember, you should always have the correct recovery seed backup of your wallet accessible before you start the update of firmware in your Trezor.
More information on how to perform firmware update can be found at https://trezor.io/learn/a/update-trezor-device-firmware.