If you like incremental idle games, this is just for you. Earn virtual currency, buy upgrades that earn you more currency and again and again. There is also a interesting story you can follow while playing. For people enjoying satisfying stuff, you can watch the process of harddisk defragmentation.

If you don't know what defragmentation is, check this wiki page: https://en.wikipedia.org/wiki/Defragmentation

Note: This is just simulated defragmentation, no files are touched on your device.