If you find that your hard is full or near capacity, you need to clean up your hard disk for proper hard disk functions. You can search for files with bigger size or you can use some simple software for the same purpose.
This is the best software to find out the space allocation of your hard disk with visual color indicator. WinDirStat is a free, open-source disk usage analyzer and cleanup software for Microsoft® Windows®.
One of the best software is TreeMap. You can easily download the software from here.