Windows 10: Excess Files I Can't Look At?

I'm trying to free up space on my hard drive and I seem to have a few hundred GBs of storage I can't look at. Can anyone help me understand my situation better??


I will update as I can with information that may help. If you need me to do something or verifying anything just tell me what and I'll do my best to get the information on here.



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This picture shows my storage devices. The "1TBD D: - 931 GB" is the one I'm trying to free up space on.

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This picture shows what files I've got to work with. The "Other" files are what I'm having trouble with.

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My problem is that I only see, roughly, 3 GB of things I could delete. Where's the other THREE HUNDRED OR SO?????


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Ask any questions if need be. Thank you for your help :

:)

 

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I'm currently in the process of buying stuff for my file server build. Going to try and keep this build all in one thread this time.

Stuff already bought:

• 
  Motherboard (socket 1155 H61)
  RAM (1600MHz)
  PCI SATA cards
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• 
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  CPU Cooler -- fanless or not?
  Case fans

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