Sorry for sounding like you mom or dad (no, they wouldn’t ask that…):
you have made backups of your wallets/private keys in some way?
I don’t know how familiar you are with crypto coin stuff. I could suppose you have some experience, because otherwise you wouldn’t have found Nu.
But I’d rather make a fool of myself asking that question than being the smartass telling you that you should have made a backup if you complain about a broken hard disk 
