Each product in the Bundle, will have it’s own installer,. once it’s downloaded to your computer, you can double click the product to install it.
Each product (installer) has a number of screens with a licence agreement, and the ability to Choose where you want to install the contents.
This is normally something like C:\users\(your-name)\My Documents\Daz3D\Studio4
for a default installation.
You can install the products to another drive, as long as you tell Daz Studio where you’re Library folder is located.
Hope it helps