Gordy,
iMovie is not installed on the external HD; the external drive is not by start-up disk; no background aps; VM is turned on.
I am running iMovie just off the 64 MB of RAM (I ordered 256 MB more; it should be here anytime). When it's installed, I'll turn off VM, allocate more memory, and give it another shot.
I might as well do Moof's suggestion, too. I've been shooting like a madman, and 27 GB is filling fast!!!
Other than this issue, my ADS case and drive rig has been flawless. Its original purpose was for back-up for my Pismo. I'll keep you informed...
Thanks for responding....