Zengaryt
as mentioned by previous poster, could you identify the hard drive you are having the issue, with make and model number please.
if you dont know you can run a simple program called SPECCY and it will give you those details.
it will help us identify the issue.
as for half your small hard drive 60gb drive being used;
Windows O/S x32 install uses 16GB and x64 uses 20GB , and that is Before updates, and upgrades (if you moved from win 7 to win 10 for example)