Hi guys, OP here. To all of you who say this was a bit ambiguous, I ran out of space, so let me explain in more detail. I had 3 separate USBs, one of which I carry around my neck to prevent this from happening. Everything was clearly labelled and everyone was aware that I was writing a book. As for the USB around my neck, labelled "Confidential - Fuck off", I took it off for a shower, and when I came back... Poof! Gone. To those of you saying I should move out, I'm 16, so no chance of that happening. And when I said "Trashed" I meant literally gone. Everything downloaded onto a separate hard drive and removed while I was out of the house. As to how she guessed my password, I may never know. But yeah, this is my follow up, hope this clears things up somewhat.