Files crashes on copy to network drive

## What Happened
When copying files to a network drive, files often crashes when it start the copy. It will show 0 of 2GB for example, and nothing will happen and files will become unresponsive.

Eventually a pop up message will appear asking if I want to wait or force quit. After selecting the force quite, I can open file again and then initiate the copy process. Most time It will then work perfectly. on a few occasions it will crash again, but this has only happened once or twice.

As far as I can tell this can happen on any file size, but on average when I copy to teh networked drive its normally for files larger than 500MB

## Expected Behavior
Files will simply copy on over

## Steps to Reproduce
1. Connect to a network drive (Login and set the login to remember the user credentials)
2.Copy a video and any large file over (Larger than 500MB)
3. Hit and miss, sometimes it will work out the box, often it does not

### Logs
Not sure how to capture logs for this

## Platform Information
Running latest Elementary )S 6 daily build with updates