where do I find my data that I had stored in nextcharge?

I would like to reinstall nextcloud on my Rpi 4 with umbrel but I would first like to copy the files I had archived.
I installed WinSCP but I don’t understand where nextcloud saves the files.
Can I recover them and make a copy on my Windows?
Help please

Do you have access to your Nextcloud config file?

You can also get the path to data folder with an OCC command (I cannot remember it on top of my head but it is a core one where you can print out details about your installation).

In there you will find a data Directory path.

yes I have access via ssh so I should find it. If you can give me some more guidance I would be grateful