Copying a directory with files of a large size sometimes bugs up the connection.

Tested with a 200GB video file directory. Started failing at around 20-40%.

Error on server side: 
```
unknown:0 - The File Descriptor link in /proc increased in size between lstat() and readlink()! old size: 64  new size: 65  readlink result: QVector(/, D, a, t, a, D, r, i, v, e, s, /, S, t, o, r, e, s, /, M, a, i, n, -, P, C, /, T, e, s, t, D, i, 
```