Can anybody help, I bought a 2nd hand garmin,and stupidly, assumed he would have deleted his data. I mean, why wouldn't you? Especially with how some people treasure their koms. Anyway, went to upload todays teeny commute, and it's only gone and uploaded all the guys rides since 2012. Is there a way I can delete all the rides associated to that device without having to go through and look at every one?