I want to buy an USB external hard drive to store photos & videos from the digital camera. Also, to free up space on the computer where a lot of those photos are currently stored & to make backups in case the computer crashes. I'm trying to decide between these to drives: $79.99 - 640gb - Western Digital WDE1U6400N 640GB USB 2.0 External Hard Drive - Retail $99.99 - 500gb - Western Digital Elements WDE1U5000N 500GB 7200 RPM 8MB Cache USB 2.0 External Hard Drive - Retail Why does the drive with Less space cost more money? Is there something better about the smaller drive to warrant the extra $20? TIA! |

