I have over 60 HDV tapes that I am finally getting around to editing. I am using a late 2009 iMac, iMovie HD, with two external drives. One of the external drives is a 3TB Seagate (not sure which model) running at 7200RPM. The other external drive is a 4TB WD Green (model WD40EZRX), which I believe runs at 5400RPM. I will be using the faster Seagate to import my footage on to, then edit. I will then export as a full quality movie to the slower WD. Finally, to my question Is the WD Green drive fast enough to receive the exported footage at full quality? I like the idea of using the WD Green drive because of it's low power consumption and excellent reviews. Ultimately, I'll be using the WD external to store home movies while connected to a Mac Mini I use as a media center for viewing on an HDTV. So, will I have problems with this workflow using a 5400RPM WD Green drive, or will this workflow be OK? Thanks in advance for feedback!