It sounds like he’s accessing it via the web browser (http://x.x.x.x). Have him open it in windows explorer with the path like “\\x.x.x.x” (without the quotes).
This device only supports SMB1, which has been deprecated in Windows 10. You can re-enable SMB1 support in Windows 10 by enabling the SMB 1.0/CIFS File Sharing Support feature.
At the start menu search for and start “Windows Features”. Check the box beside “SMB 1.0/CIFS File Sharing Support”. Once you’ve done that you can access the device using \xx.xx.xx.xx.
You can map a drive to the SMB share, but know that Windows 10 currently has a known issue with re-establishing network drive maps. You’ll have to launch the drive map in Windows Explorer (e.g. Start "m:") every time you reboot, and let windows whinge and complain while it (successfully) re-establishes the map before other programs can access the share. God I hate Windows 10.
is this accessible via network i.e switch or modem as its anetwork drive not usb? I have 2 but now Mionet isnt supported im stuck with 2 perfect hdds with files i cant access