Used space in primary storage

Dear NextCloud Support Staff,

First of all let me thank you for this great software!

I have been using it for several years now and I have a problem with a VirtualBox virtualized installation where I have a reference in a /media directory to a folder in the hard disk of the host computer. The problem is that in the /var/snap/nextcloud/common/nextcloud I have the same folder structure and files (ocuppying space and making the .vdi VirtualBox file growing and growing) that exists in the /media/folder_in_host. I have created the /folder_in_host folder as an external storage shared with all the user where they are supposed to be saving their files. All of them are saving the files in there but I get the .vdi file growing every day and I realized (with the ncdu command line program) that this is the reason.

Could you please help me with this issue?

Thank you very much and have a nice day,
Ignacio.