I went to purchase a bigger hard drive for my laptop today,and was astonished to find out that of virtually all of the Compaq laptops,mine was the only model that could not upgrade.I have a ten gig drive,but am fast running out of space.The tech told me that an external hard drive would cause glitches when I tried to play mp3 files stored on an external drive.Has any body had any experience with this.I have usb 1.1 and was hoping that a forthy gig external drive would work.