People make it really complicated when they talk about the safety of their wallets.. It is very simple thing that you have the key to your house and in the house you have gold pots with diamonds filled in. How do you see everything? You will obviously keep tight security around it and you will save your keys to somewhere place very safe.
Its just that you have to safeguard your keystone file and private keys in the same manner. Thats the only key to open up the whole thing so why not take extra precaution and save them with multiple copies on different hardware? You can always print the private key and place it somewhere safe. Simple.
Hahaha, you store the private key like diamond and gold. Actually it does not needed at all that kind of security mate. I do not think you have big fund in your wallets. Better concern you could buy the hardware wallets like Trezor or ledger Nano s to keep your fund safe dude.
Other than if you have small amount just install the desktop wallet which is most used in your personal handy. That is enough and keep your private key in your computer hard disk and desktop folder with the app locked.