are you useing windows? if so you can easily open the command prompt an map the drive.
For example if the network name of your MyCloudEx4 was “MyCloudEx4” and you had a share called Public then you would enter the following command to map the drive:
net use H: \MyCloudEx4\Public
This will map your share to the H: drive letter, if that drive letter is already taken you can just change it for any drive letter you like.
If the share is a private share, you will get a prompt after entering the command asking you to provide a Username and Password to access the share. There will also be an option to save the username/password for the mapped drive if you dont want to keep entering it every time the computer reboots or looses connection to the Ex4.