Why use a Trezor for cold storage?
Keeping private keys on a purpose-built device that is disconnected from the internet significantly lowers the risk of remote compromise. A Trezor device signs transactions on the device itself; only the signed, non-secret data is shared with your computer. This separation of secrets from networked devices is the core advantage of cold storage.
What you should have ready
Unbox the Trezor and verify the package seal. Keep the recovery card or seed storage method provided with the device. Use a trusted computer or phone for the initial steps and ensure you download software only from the official sources. Backups are the single most important piece of a secure setup — plan where you will store them physically.