I've had iTunes running a LONG time on the record store's computer. A couple years back, I brought in an external hard drive and copied the library (from my Windows PC running iTunes) onto it in case the computer kicked the bucket. Fast forward to present day and I'm WAY overdue to back up iTunes again. What is the proper way to actually do this? And please speak slowly.....I'm stupid. Also, once backed up, I plan on taking it home and transferring it to my Windows PC at home and having the same library of tunes in both places. At that point, what is the best way to do a monthly backup (I think 2 PCs and an additional external hard drive with the same material should make me reasonably bulletproof). Thanks in advance for your time (and expertise).