hard drive showing 2 different used space, over 30 gb of space missing from memory

[shorekyle3]

So i have an SSD and a hard drive and I checked their properties and highlighted all their content, the content adds up to less than what is telling me is used. I have pictures to explain more, I wish to know what happened to the other storage I have.

https://imgur.com/a/syVguRO

 

[jay32267]

This is not unusual....unless the totals are WAY off.

What are the totals? If they are withing 10-20% that might be normal.