The essence of anti-theft is to prevent our private key from leaking or being stolen by hackers.
In the anti-theft strategy, Keystore and mnemonic have the different focus.
Keystore is encrypted private key and its contents are encrypted information. It’s not wise to write down Keystore, it’s better to store it on your USB disk, try not to store it online or in the cloud. Store Keystore and password separately, so even hackers steal Keystore, it is difficult to take your asset.
When store mnemonic, you need to be more careful, because mnemonic is no secured at all, once the third party has it, your assets will be at risk. We recommend you to back up with physical media, copy it on a sheet of paper and keep it properly. When copying the mnemonic, make sure it’s accurate and clear.