Where are Nextcloud files stored in Ubuntu 18.04 if installed via snap, and how can I change it to use Volume as storage?

Using this guide: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-nextcloud-on-ubuntu-18-04

I can successfully set up Nextcloud. However, I want the file storage to be on a block storage volume.

I’ve tried using this guide: https://www.digitalocean.com/community/questions/best-practices-using-block-storage-on-do

But my var folder doesn’t seem to have a www folder.

So my question is: where exactly are files stored if I followed the guide: https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-nextcloud-on-ubuntu-18-04

and how can I configure Nextcloud to make use of the Volume I have mounted (Volume NOT Spaces)

Or, is there another way of installing where I can specify the Volume during install? (Happy to do a reinatall or even destroy/create a new droplet)