In 2008, the same year I had to stop playing my Viola and violin due to shaking, my computer's hard drive broke and I lost 6 years worth of composing. Among them my first full-length symphony (37 mins long for a large orchestra, which took me almost 3 years to finish!), three stringquartets, other chamber music, and choir pieces. About 35 hours of music lost... So I'm not taking any chances now!