I bought this because I had a lot of stuff I wanted to save onto hard drives, as the discs they were stored on were reaching the end of their shelf life, and just not working anymore. As I wanted to have different things on different drives, I wanted something that I could slot the drives into to add to when necessary.
This docking station fit the bill perfectly, at an extremely reasonable cost. I have started moving stuff around to get everything together, and it just makes changing hard drives so simple! Love it!