I am debating the purchase of a Mac Pro. I will buy three drives in addtion to the stock 1 TB. Furthermore, I like to take pictures with my point and shoot. Curently, I have around 10-12 GB of photos and less than one GB of videos. The plan is to buy an entry level dslr later this year, which leads to my question. How large of a hard drive should I buy? Will 500-750 GB suffice? I will SHARE the hard drive with other saved data too. Is this a problem? I know this question is subjective, but bare with me! I figure filling up a 320 GB drive than buying another drive will get old fast. Of course, assuming I take that many photos. Maybe the 320 is a good option? Nonetheless, all suggestions are appreciated.