the best way to store seed are storing in any places, like USB, Harddrive, and write on the paper, and at lease write on 2 / 3 papers, and placed on different place, i think it will save, if you usb broke, you still have hardisk, if usb and hardisk broken, you still have a sheet of paper. so i think its the best way to store seed
I do have mine written on a piece of paper and I have it fitted on my wallet that is on my clothing drawer, that leather wallet isn't used outside of my house so it is pretty safe in that place and I don't think that someone who doesn't know a thing about those seed is probably going to throw it away thinking that I am weird for storing a strange paper with gibberish phrases.