Windows 10 created a drive "E" for data, that is completely full, but I have not put anything on it. I am getting warnings that this data drive is out of space. Prior to Windows 10 installation, my 1TB data hard drive was unplugged. That drive was drive "E." When Windows 10 installed, it created a new "E" drive for data. I guess it partitioned that off of drive C - which is a 250GB Samsung SSD. This drive "E" size is 99.9 MB of which 99.9 MB is used. It will not let me see what is on this drive, I guess hidden files. Is this a required Windows 10 drive? If so, why is it identified as "DATA?" How can I fix this?