[NextcloudPi] Can I reduce the size of nc's partition?

I’ve got a new installation of Nextcloud 12, using Nextcloudpi, which is working well. I have a large disk attached to a USB port on the pi and don’t need all the space for nc. Can I simply re-partition the disk using parted or Gparted to free space to create another partition to backup one share from a fileserver?

sure, no problem

Thanks for a very quick reply - and thanks for nextcloudpi, it was a very straightforward installation.