USB is too slow for video editing, and you need AT LEAST two 7200rpm hard drives
Read Harm on drive setup http://forums.adobe.com/thread/662972?tstart=0
- click the embedded picture in Harm's message to enlarge to reading size
- you need AT LEAST 2 drives for video editing, 3 is better
Trying to use only ONE Hard Drive for Video Editing
You are a music conductor, with a baton that you use to point to various parts of the orchestra... this is like Windows pointing to various parts of the hard drive to do Windows housekeeping or to load program segments for various functions
Now, at the same time and with the same hand... while still using the baton to conduct the orchestra... pick up a bow and play a fiddle... this would be doing something with your video file at the same time as all the other work
You as a person cannot do both at the same time with the same hand
A computer is a LITTLE better, in that it can switch from one kind of task to another very quickly... but not quickly enough for easy video editing
One hard drive is not as good as two which is not as good as three
Along with John T's advice, this ARTICLE should give you some tips, for getting the most out of your laptop.
With AVCHD material, you have three choices:
- Live with the horrible performance
- Upgrade to a fast Quad-core CPU, or better yet, a fast i7
- Convert with NeoScene (also see this ARTICLE on Proxy Editing)
For using an external HDD for editing to/from, I would look to a minimum of FireWire 800, or better still, eSATA.