Now... I am not exactly what you call a techie, but wasn't your hard drive inside your computer at the time?
If you rechecked your data in torrent application and was 100% there then it says "seed" on the damn thing, then it should be ok...
It just sits there if there are not seeds to connect to your device, may it be a computer or just a hard drive (external I suppose).
...you should recheck it every now and then, just to be on the safe side.