Keep life simple, just copy ALL the contents of your SD card to a hard disk. On PC use Explorer for that, on MAC I believe it is called Finder.
Once all the contents have been copied, you can reuse your SD card for new shoots. Make sure that you regularly backup your hard disk, because it is the only instance of your precious shots and everything will be irretrievably lost if you encounter a disk failure and you have no backup.
Thanks Mr. Millaard. I never thought of just dragging/dropping from Finder (you're right about that name...it's Finder on the Mac). So, I just compared all my transfers (all the same clip, 6 minutes and 27 seconds in length fyi):
Video 1 imported via iMovie at "Large 960 x 540" : file size = 1.47 GB
Video 2 imported via iMovie at "Full - Original Size" : file size = 6.02 GB
Video 3 imported via drag/drop from Finder onto iMac: file size = 754.5 MB (the camcorder saved the video clips as .mts files, fyi, but VLC player had no problems playing them)
I guess my follow-up question would be, is the drag/drop method, resulting in a mere 754 MB clip really the "original" file size, leading me to believe that the other imports of 1.47 GB and 6.02 GB are just wastes of space? Is iMovie really bringing in a better quality video if the "original" video that is on the camcorder/SD card is only 754.5 MB?
Thanks. Again, I just want to import the best quality video to the iMac before ridding the camcorder/SD card of the video.
Thank you again.