Create partition on ssd after installing HA

hi,
I installed HA on a mini PC by pulling it's SSD (256GB) out and using balena etcher with the os image file. The installation went smooth, the server starts fast and looks good.
Now I'd like to use that unused space on the SSD to:

  1. make one or more NTFS partitions
    and
  2. share them on the local network

How can I do this ? Thanks a lot

oh and, Minitool partition wizard (on pc) shows 8 partitions which were created on that SSD during the installation process.

Samba app for file sharing.