An external HDD (with no external power support, 2,5') doesn't work in a Lenovo unit with Vista (G530), shown as unknown device.
All Idea Systems with Microsoft Vista
You have to install all windows updates first and then install Lenovo Energy management software.
About how to download drivers and software: please go to http://support.lenovo.com/en_US/downloads/default.page? -->enter your machine information like B560 in the product search box ---> click the green button besides the box --> select Lenovo B560 Notebook. Then you can see all the drivers and sofware. Download what you need accordingly.