only a properly created cold storage or a trusted hardware wallet.
you can search for some hardware wallets if you are not tech savvy or don't want to bother learning how tos and if you are willing to pay. things such as Trezor or Ledger nano would work.
or you can learn more about cold storage and do it yourself easily. like creating a paper wallet with tools such as
https://github.com/pointbiz/bitaddress.org or make a Trezor like cold storage on your USB disk yourself
https://en.bitcoin.it/wiki/Cold_storageDid you heard the story of a burn building in London? Cause of the fire a guy lost 1000+ BTC which were in his paper wallet. So I would not call a paper wallet as 100% protected after such case. Yes, the possibility that it will happen to you is a little, but...
This like hardware wallet can be burn but you still the best to be safe if you had also backup of them to save in your archive rar file with password and save only in your google drive no one can get that file publicity except if you share it..
Ledger nano base is not safe in keylogger unlike trezor wallet so if you want to keep your bitcoin safe from keylogger and virus you should choose trezor.
Ledger nano also good but looks like they can prevent the keylogger so better to use ledger nano if you are saving altcoin and bitcoin and if the computer has anti virus or if you are using mac apple os..