Make A Secret Hidden RC Hard-Drive

This circuit makes a hidden emergency HDD to be controllable only by your key, regardless of how many people use the same computer.

This HDD should be used only for Copy and paste, because of low power of relay batteries, if you want it to work longer, add more batteries using parallel connection. Or use a stronger RC Circuit.
This is an electronic Hack to protect the data from Software Hackers,or some-one you don't want him to access your data.