im having problems copying files from my winvista laptop to an external hd. these are pics and videos i take when i go to hip hop shows, and id be very freaked out if i were to lose these, so i need them backed up. it happens for a few files, not all, but i usually get a msg asking me "you sure you want to copy this file without its properties?" with the options of yes or no. what properties is this msg referring to? would i be losing anything important if i hit yes? will the files still play? and will they play on a winxp pc? pls help!