Adding more space/disks/units to nextcloud server

Hello to everyone. My name is nicolas i am from argentina and have installed nextcloud with snap command in a ubuntu version, which is in a VM. Its worked perfectly fine and i can log in from anywhere.
But, i need to add a 4tb disk to a existing 1 tb disk.
I couldnt find any information about this topic.
Can you help me?

It sounds like probably what you need to do is mount and format the additional disk and then move your Nextcloud data folder to it. For that part you can find many topics here.

As for specifics about the mounting etc., this is really more a question regarding your operating system.