You should probably discuss this with your Web host to eliminate any problems on their end first. And don't assume that just because their first response is "Well it's nothing on our end", that they are correct. Questions them, make it discussion, not just a yes or no answer.... any recent server changes, updates, breakdown, etc.
If that pans out, then you can focus on DW problems.
I have already discussed it with my host provider and I'm satisfied that the issue is not on their end. If it was it would not make sense that I am able to upload the files with filezilla and not with Dreamweaver.
This may not be the answer you want. I work with a lot of media files on a regular basis and I never use Dreamweaver to upload them. I can add 400 videos to Filezilla's queued files folder and let it run all night. Providing my internet connection doesn't time out -- which occasionally happens when network traffic is high or there is an electrical storm in the area. In my experience, Dreamweaver's FTP is not as fast or reliable as Filezilla's for heavy file uploads.
Alt-Web Design & Publishing
Web | Graphics | Print | Media Specialists
I second your suggestion Nancy. I never upload with Dreamweaver, I use SmartFTP but often recommend Filezilla to clients who want a free FTP program.
I'm beginning to see the light with regard to FZ - I`m not sure yet if it's faster but it's definitely easier on my CPU than dreamweaver. Still don't know why this error has suddenly appeared though!