My 3-year-old Windows 10 Pro Dell Desktop includes a 200 GB solid state drive and a full 1,000 GB old fashioned spinning drive. I'm running out of space on my solid-state drive. (Yes, TRIM is enabled). I think the problem rests with the fact I download a dozen odd manuscripts on science and math topics in the pdf format on a daily basis. Even though I delete these files, I think they are stuck in some way on my solid-state drive. Am I right? Can anyone tell me how to free up space on my solid-state drive?