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I'm new to Elementary OS and after a week of using it I decided to check how much disk space I had used so far. I went to my SSD (Which used to be C:), right-clicked and looked at properties. I found the information I expected, though somewhat skewered. Now, please do correct me if I'm wrong... But does this say I have one-hundred-and-forty point seven Tera-bytes worth of files on my ~250GB SSD?

I like the OS so far... but this seems rather miraculous. What's causing this?