Recently, Toshiba released a new version of the Canvio external HDD for Mac computers, which comes with customized backup software pre-loaded. This device sports USB 2.0 connectivity and a shock sensor to guard against light impact damage. The portable HDD is also available in 500GB, 750GB and 1TB versions of storage capability. The 500GB model is on sale for $99.99, the 750GB model costs $119.99 and the 1TB model is priced at $139.99.