Quick video of what I experience with Vegas pro daily with any large imports. The folder Im importing contains 27 gigs of assorted x264 media. You can see when I hit ctrl+a vegas pro wont let me even hit open until the hard drive is done "reading all the files" indicated by disk use; and once it does it freezes. Same result for me on vegas 17. What is puzzling me; is the trail of movie studio works as intended with almost no lag during the same exact import.
https://www.dropbox.com/s/6y0kzl0jqh0p2g8/20200415235500.mp4?dl=0
System Specs
i7 7700k @ 5ghz
16gb ram
gtx 1080