Dell Inspiron 3162 SATA driver for windows 7 reformat

I purchased this variant of the laptop recently.

www.ozbargain.com.au/node/261518

Basically, I can't find the SATA drivers needed for the laptop to recognise my SSD when booting from a windows 7 pro usb drive (laptop came shipped with windows 10 home)

I've been following this guide.

dellwindowsreinstallationguide.com/a-clean-install-of-windows-7/windows-7-installation/

I've followed the instructions to use legacy boot and to turn off secure boot, however I think I need the SATA drivers so it can recognise the 128GB SSD as I've been getting this prompt.

youtu.be/J_uWgOuZM-w?t=1m22s

I can't find the "intel rapid storage SATA pre-os" driver on the dell website, like this guide states here

dellwindowsreinstallationguide.com/a-clean-install-of-windows/downloading-preparing-and-loading-sata-drivers/

I am not knowledgable about how the BIOs interacts with windows 7/10, and/or what legacy boot or UEFI does. I'm really just following guides