Double Slash Problem when creating dynamic path

Hi there ,

I have been trying to create a dynamic selector for my path and use it as a path for read text file activity.
here is my path
“\sp-boafs\GIBPortfoy\PortfoyXml\Mevduat_Portfoy_”+now.ToString(“yyyyMM”)+"-"+Now.ToString(“yyyydd”)+".xml"
and the output of the path is here
“\\sp-boafs\GIBPortfoy\PortfoyXml\Mevduat_Portfoy_202002-202012.xml”

Because of this double slash problem I get error(Read Text File: One or more errors occurred.)

How can I solve this problem?
Thanks in advance