This is starting to get frustrating. Again, I tried to take a removable drive from one PC to another to render and Vegas keeps complaining it can't write the file. I'm not new to doing this having done it EXACTLY this way dozens of times.
There are no permission problems, the file isn't marked as read only. No other application on either PC has a problem only Vegas. I have over 125GB free and only rendering a file that should be about 10GB. Five minutes before it worked fine. I stopped the render to make a last minute change, and now Vegas refues to write anything to the removable drive.