Computers do tend to slow down as the hard drive fills up.
Some of this is unrelated to the hard drive; as they age, operating systems get bogged down with extra programs and files that slow down the computer.
When your RAM becomes full, it creates a file on your hard drive for the overflow tasks.
Does a full hard drive affect performance?
The size of your hard drive doesn’t affect how fast your processor runs or how quickly your computer is able to access the Internet. However, the hard drive’s size plays a role in overall computer performance, but is a secondary role.
Do SSD drives get slower when full?
The reason why lies in the way SSDs and NAND Flash storage work. Filling the drive to capacity is one of the things you should never do with a solid-state drive. A nearly full solid-state drive will have much slower write operations, slowing down your computer.
What happens when the hard drive gets full?
What happens when your hard drive gets full? It had a 35 GB hard disk that was completely full. Most programs, including the operating system are constantly reading from and writing to the hard disk. Windows also generates a massive pagefile, which is basically scratch space to augment physical memory.
How much free space should be left on a hard drive?
The 15% Rule of Thumb for Mechanical Hard Drives
You’ll commonly see a recommendation that you should leave 15% to 20% of a drive empty. That’s because, traditionally, you needed at least 15% free space on a drive so Windows could defragment it.