refer to the message, the system cannot open the path, it could be many reasons why the system cannot access the path.
One of the very common reason is the file name is not a legal path. refer to this message, the file name is got too many "\". in windows file sharing "\" means the sub-directory, and the system cannot find such directory in this case.
Thus, you need to install and login to SQL Management Studio and rename the database name to rename and remove the "\", it is advisable to have a simple file name without any symbol and in the alphanumeric form. e.g. ABCCompany2014
Note: Please make sure you get your version is 2015.0.1.4 and above
To learn how to install SQL Management Studio, Please visit http://support.qne.com.my/article.aspx?cid=3203&aid=61090