As long as they are encrypted, you can move them anywhere...
If you really want more protection... you can zip and lock them up in a "zip folder", or with 7zip, or win-zip, or win-rar, etc... (Gotta add password in the options)
Even more protection... hide them in an image, as an image of your key. (the letters in paint) lol, low-tech for high-tech...
They will never think to open "secret.jpg", and actually know what it is for. Unless you write that in text too... "This is my private key for bitcoins"
Um, make a recording of your key as a wav or mp3...
You will have them stumped!
Split it, so it is three seporate files... one JPG, one ZIP, one MP3, all have part of the code... lol