To ensure the privacy of your private key, I think you should buy external storage devices such as USB, saving essential private information on USB is very safe because if you do not use you will withdraw them from the PC so can avoid hackers.
It is indeed a great many ways to secure the privacy of this key depends by the owner also heck, in the Save in USB and pc also delicious just advice the gan anyway preferably at either gan in order to keep the guard when his usb virus