I am trying to save a video clip to an external hard drive. The drive already has plenty of files on it and plenty of room left. This is an intermittent problem, as other files from this project have been happily saved to this drive. The clip in question saves to the C: drive with no problem. There is no Internet or downloading involved with any of this. I have seen published solutions to this error suggesting removal of colons from the file name (there are no colons in this file name) and to use a registry cleaner (someone is trying to sell a registry cleaner). Obviously nonsense. Can anyone suggest a solution to this very annoying problem. BTW, rebooting the computer sometimes fixes it. Thanks.