I work at a hardware store. And today my boss showed me this thing on his computer. His SSD is constantly filling up no matter what he gets rid of. I found where this, as I call it "Hide and Seek" file, was hiding. It was hiding under CSC in program Files(x86). I opened properties and noticed that there was nearly 60 GB in this one file. And his 120 GB SSD was full because of this. I attempted to get into this file to see the issue. It blocked me. Must be a virus right? I eventually took ownership of the file and got in then it moved. It jumped. Just moved to a new file so we kept chasing it. Every time we found it and tried to access it it just jumped again. it didn't deny us after that but it kept moving. What is this thing?