When working with large files via WebDAV, you may encounter errors during upload/download.  These errors are controlled by Windows on each individual PC. 

Windows defaults the limit of downloads to 50MB and uploads to less than 30 minutes.  Users can adjust these settings to increase the size and/or timeout as needed.

These settings are outlined at the Microsoft Knowledge Base article linked below.  Note there are two separate settings, one to handle uploads and the other to handle download. Additionally, while the link below refers specifically to Windows 7 **, it applies equally to Windows 8 and Windows 10.

** Microsoft support for Windows 7 will end January 14, 2020 and Kahua support will end simultaneously. Due to this upcoming change, we are posting a minimum of Windows 8 with the recommend version being Windows 10.  Kahua will continue to support Windows 7 through January 14, 2020.  Customers currently using Windows 7 should make immediate plans to update their systems. 

Microsoft KB 2668751