Upgrade g-drive

I’ve got the G-DRIVE 2TB for 6 years. How do I upgrade from 2TB to 4TB?
Can I upgrade in Brazil?

Sorry for my English.

Thank you!

MODEL OF MY G-DRIVE: 0G00203 GD4-2000.

Take it apart and remove the existing drive, replacing it with the 4 tb drive of your choice. It’ll work fine.

Thanks! DO you have a link or product that i need to buy?
Is it easy to switch from the current to the 4TB? Just open the GDRIVE box?