Timeshift Pull NAS Data Into The Backup

Mounted the below drives:
///Movies /opt/plexmedia/movies cifs credentials=/opt/plexmedia/.smbcredentials,vers=3.0,sec=ntlmssp,iocharset=utf8,noperm 0 0
///Pictures /opt/plexmedia/pictures cifs credentials=/opt/plexmedia/.smbcredentials,vers=3.0,sec=ntlmssp,iocharset=utf8,noperm 0 0
///TV\040Shows /opt/plexmedia/tv cifs credentials=/opt/plexmedia/.smbcredentials,vers=3.0,sec=ntlmssp,iocharset=utf8,noperm 0 0
///Video\040Choreography /opt/plexmedia/choreographed cifs credentials=/opt/plexmedia/.smbcredentials,vers=3.0,sec=ntlmssp,iocharset=utf8,noperm 0 0
///Videos\040Family\040Taken /opt/plexmedia/family cifs credentials=/opt/plexmedia/.smbcredentials,vers=3.0,sec=ntlmssp,iocharset=utf8,noperm 0 0

Next day I checked my linux mint computer and I had a message on the front screen that I had zero diskspace left and my login was frozen, so I could not even login the normal way.

Once I deleted the Timeshift backups and excluded the mount points in Timeshift, everything work and has been working. So, far everything has been working and I have not encounter any more disk space issues

Expected behavior
I did not think Timeshift would pull over the data from my NAS and store it on my hard drive. I have a 500GB hard drive and the space normally is at 50GB.

Screenshots

System:

• Linux Distribution Name and Version: Linux Mint 22.3
• Desktop: Cinnamon
• Timeshift Version: 25.12.4
• Timeshift Mode: rsync
• Display Server: [e.g. X11]

Start by reproducing the rsync-mode backup with the listed CIFS-mounted NAS paths on Linux Mint 22.3, then inspect how mounted paths are handled by Timeshift. Done means the behavior is clearly established and, if confirmed as a bug, the issue identifies a specific change needed to prevent unintended NAS data from consuming local snapshot space.