I'm not sure if this product exists, but maybe someone here knows or can recommend something. What I'm looking for is some sort of external drive which allows me to connect 2 different computers (one Mac and one PC). Currently, if i want to take files from my desktop to my Mac I use a thumb drive - but was hoping there was something more static that I can keep plugged into my desktop at all times (like an external drive) and then just plug into the Mac as needed. (the thumb drive I had doesn't have alot of space, and I was hoping for something larger). Are there any external drives that allow you to connect 2 computer's simultaneously?