Disk Space used is showing more than the Actual size of data in it
I have a qlikview server where in the size of the Used space on Disk storage (D drive) is 200 times more than the Actual size of the data in it. These may be because of Pagefile is also getting stored due to more RAM. There is also an unallocated space in the partition which is not getting utilized.
How these space of D drive can be reduced to its actual size and these unallocated space in the partion server can be utilized or any other alternative to reduce the D drive space.
Server Configuration: 256 GB RAM, and Storage of 500 GB and also attached the screen shot of the disk space.
Hope someone can give me a clue here. Appreciate the help.