- https://www.youtube.com/watch?v=NtPc0jI21i0 How a Hard Disk Drive Works
- https://www.youtube.com/watch?v=wteUW2sL7bc how do HDDs work
- https://www.youtube.com/watch?v=FS3jmgIzwO4 open HDD working
- https://www.lifewire.com/what-is-fragmentation-defragmentation-2625884
- https://en.wikipedia.org/wiki/Defragmentation nice animation to demonstrate concepts
- https://computer.howstuffworks.com/solid-state-drive.htm
- https://www.youtube.com/watch?v=dZcszUj5szA memory types
- https://www.youtube.com/watch?v=g1N3l1l43kE Main Memory (RAM, ROM and Cache)
- https://www.youtube.com/watch?v=ELl3abwYQ90 flash memory
- https://blogs.systweak.com/2017/04/how-to-increase-virtual-memory-in-windows-7/
- http://www.techiesweb.com/a-small-overview-of-system-virtual-memory-and-windows-paging-concepts/
