Its a bad idea keeping a copy of your 2FA backup keys on cds or flash drives or any other digital format in a raw text, but if you do, you should always encrypt those with a strong password.
You should do to your 2FA backup key the same you do to your seed phrase or private keys.
Exactly since doing that could make you still at risk of hacking so best to store your back up keys out on your PC. Maybe use different device such as smart phones so that you can secure your accounts for any unwanted incidents. But we shouldn't rely only on 2fa security or backing it up since we also need to be careful on the links we are typing since there are phising sites or clicking any unknown links since there are malware that can penetrate to our accounts, just play simple without being curious on anything and for sure you are accounts is so safe.
on where we do store up our funds or assets. Always mind off about the security and safety because there are lots of hackers and scammers nowadays.
Yes curiosity is sometimes not bad actually we can learn many things due to our curiosity but we also need to take this in proper way like I said always use separate device if you are curious to click a unwanted link so that your accounts stored will be safe from any harm.
Security measures should be taken more seriously since hackers has so many method use just to exploit user so before them to outsmart us we need to do many counter measure to make sure that any of it cannot penetrate to our device used.