To: ljl
AVS Video Editor project does not consist of video (audio or image) files used in the project, but rather of the links to those files on your PC, that is why if you replace the folder with the files, or extract the disk with them, it won't be able to playback or save the project in AVS Video Editor. For now we recommend you to copy the video you need to use in AVS Video Editor to your hard drive first, then use the program.
Regards