Knowledge about how and where to store files.
If you do not have the practice of File Management and habit of organizing the system drive space and file management in to multiple drives its the cause for several system errors.
Several system users use to save their files on the desktop screen. Keeping important things on the desktop is comfortable. But it can slow down your system.
And if your system has only single drive space then it may lead your system run slow or hang often. So when you try to save your files assort it according to your need in different drives and choose those specific drives to save the files.
So dumping all the files in a single drive or on desktop may lead your system to go slow or hang. Avoiding keeping our personal files in C drive can help you to safeguard your files if the system halts or crashed. You can get back those files easily through data recovery. So save your files always in drives other-than C Drive.