C disc got reduced after burning files to CD/DVD

[JohnMecton]

I am having issue with disc space being reduced after burning files to DVD ( 4 gb ) Can anyone help me explain why is this happening and how to restore my disc space ?

 

[CTurbo]

MERGED QUESTION
Question from JohnMecton : "C disc got reduced after burning files to CD/DVD"

[delete this thread it was mistake forum]

 

[COLGeek]

Is the amount reduced the same amount as written to your DVD?