How to solve could not save a file error.

[jayeshpal45]

Could not save file "C:/Users/jayesh/Documents/maya/projects/Mercedes_AMG_GT/scenes/Mercedes_Rig.ma".

Getting this error every time I try to save a file or auto save takes place.  

Have anybody an idea, how can I solve this problem? I can't save any file.

[Christoph_Schaedl]

Did you ran out of diskspace?