My primary computer is a 2005 iMac G5 (iSight) running 10.5.8. Over the past few years, my array of small-to-medium-sized external hard drives has grown and is now getting difficult to manage. I'd like to consolidate their contents onto a single 3TB external drive and then clone that to another 3TB drive for backup. If I buy a Seagate 3TB external, will I be able to reformat it on my iMac and make use of the full 3TB capacity? Or do you think my old computer will have difficulty recognizing a 3TB drive? Here's the drive I'm considering: http://tinyurl.com/97wftvu Thanks for your help!