What is inside the box

i have an dg33bu motherboard which uses legacy bios and can i use wd green 3 tb in my desktop
also i live in india so if i purchase it with any of the online retailer will they give the required hpa which is given by WD

Is your system equipped with SATA ports? Even if your system uses a legacy BIOS you should be able to use a 3TB drive as a secondary unit depending on your Operating System.

yes i had sata ports 2.0
iam using windows 10 pro 64 bit on my desktop
can i use wd green 3Tb internal hard disk (WD30EZRX)
can i use it for booting windows