Accesing drawings *.slddrw files in 3DExperience xDesign

Hello, I am new in SolidWorks.  I purchased the Cloud 3DExperience xDesign license  to work on both 3D and 2D drawings.  I worked in the university with some 2D drawings that were saved as *.slddrw.  However, when I try to open them in my cloud service, I get the error message "Unsupported File Type".  What am I missing in order to be able to load files with extension *.slddrw?  If I cannot make it with my current subscription then I will request a refund to Dassault Systemes.  

 

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