Problem

You try to open a document library with many files by clicking on ‘Open in windows explorer’ and get the following error message:

\\server\webfolder\folder is not accessible. You might not have permission to
use this network resource.
Contact the administrator of this server to find
out if you have access permissions.

A device attached to the system is
not functioning.

Solution

The problem occurs because the size of all the file attributes that are returned by the WebDAV server is much larger than what is expected. By default, this size is limited to 1 MB.

To work around this problem, you need to modify the windows registry on the client computer.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters\
Value:
FileAttributesLimitInBytes
Data Type: DWORD
Default Value: 1,000,000
decimal (1 MB)

Change the default value to a larger number, e.g. 100000000 for 100mb.