Brand new 4tb my Passport only showing 1.6tb usable space

As the description says. I bought a new 4tb drive to store movies and TV shows to watch whilst I’m away at work on my Samsung galaxy note 8. The box says its ready to use right out of the said box. However, it showing only 1.67tb capacity! What’s that all about?

Have you used any HD of that size before on the Note?

If not, it’s possible that the Note doesn’t support GPT partItion type which is required for 4TB drives.