I want to install Ubuntu 18.04 alongside Windows 10 using a USB flash drive on an Asus K401UQ laptop - i7 6th gen, 8GB RAM, 1TB HDD + 24GB SSD.
I have left enough unallocated space to install Ubuntu using the - diskmgmt.msc - Windows 10 application.
The problem is I can't find the hard disk when I try to install it as shown in the below screenshots.

