So my iMac needs it's volume repaired. I have my OSX Disk. I have a geeksquad warranty on my mac. So I've been getting Beach Balls and my mac has been freezing. Geek squad helped me diagnose the problem. Since I have the black tie protection they told me to take it to Best Buy so that they can fix it. I think I know how to do it myself, but I'm afraid of accidentally deleting my hard drive. I really don't want to take this big computer all the way to best buy. Should I just let them fix it or try it myself?