Where is the safest place to keep USDT?

Could you please enlighten me on the safest avenue to safeguard my USDT? With the volatile nature of cryptocurrencies and the ever-present threat of hackers, I'm keen to ensure that my assets remain secure. I've heard of hardware wallets, exchanges, and even cold storage options, but I'm not quite sure which one would be most suitable for my needs. Could you elaborate on the pros and cons of each option, taking into account factors like security, accessibility, and ease of use? Your insights would greatly assist me in making an informed decision. Thank you for your time and expertise in this matter.