Late 2009 mini (2.26GHz) with internal 5400RPM drive. I'm using Elgato eyetv one for over-the-air HDTV tuner and recording on the elgato sw. With the internal drive set as Elgato's working drive, I can both record TV and view a recorded program at the same time. But, the internal drive is small and I need more storage. One route, of course, is to install a new drive internally. But I was wondering if I could just add an external to handle the files. This would require (in the above scenario of recording and viewing) lots of data both to and from the drive. I tried it with a 3.5" 7200RPM with a USB external enclosure. Not good. Then I tried a 2.5" 5400RPM drive with a FW800 enclosure. Worked almost flawlessly, but there were a couple of dropped frames. My question -- if I purchased a 2.5" 7200RPM drive over FW800, will it make a difference, or is the bottleneck the FW800? Any help is appreciated.