Summary: We were using an unpowered USB hub that could not handle a small portable USB hard drive, so we bought the powered Gear Head 7-port USB 2.0 Hub. This has proved to a very low cost solution and now all devices, including a USB wireless mouse are working as they should.
Summary: The square design allows you more space to plug in your items without crowding them together. Sometimes ports are placed so close together that some devices just can't be plugged in side by side. The hub was very easy to install and all the devices I run through it are running at top speeds.