Troubles storage space

Hi!, my name is Sergio.

I need some help with the initial configuration of nextcloud.
I have installed nextcloud on ubuntu server 20.04. I have used the default installation provided by ubuntu server.

Nextcloud works correctly, however, when I access the system information with the administrator user, it informs me that I have 179 Gb free.

The capacity of my machine is 1.5 Tb.

I just installed nextcloud and the ubuntu server machine does not contain anything besides nextcloud.

Why is nextcloud not using all the storage space?
How can I change this?

I hope you can help me. Thank you for everything