I needed to create some space! My PC (aged 4.5 years) could well be running slower than it should so trying to help it as much as possible.
Certainly, a person can move much faster with a lighter knapsack vs. a heavier knapsack, but a computer is not a person. A computer doesn't have to work harder if there's more data on the hard drive.
Similarly, a person can work much faster if they don't have to search through piles of books and papers for what they need, but a computer is not a person. Even an old computer like my almost 14-year old desktop running Windows 10 can find files anywhere on the hard drive in milliseconds.