Linux Server Recording to Synology NAS Permission Issue

[Jator 10]

I have an Ubuntu Linux 24.20 Server (CLI only) that I have installed Emby on. I have a Synology NAS that I store all of my recordings on.

Both local users have the same username and password.

I've mounted the Synology storage path (/volume1/media/[various folders]) as /mnt/media_nas and able to access with my local Ubuntu account.  I used CIFS to setup the share and have it permanently mounted using an entry in /etc/fstab.

I can access the media_nas folders through various applications, including Channels DVR to record directly to.  However, when I try and connect with my Emby Linux server to record directly there, it gives me an error saying it can't record there.  I can access the folders on the media_nas as I have my movies showing up in Emby, so it seems to be a write permission issue.

Any suggestions on how to address?  I did a search on ChatGPT and it suggested this: 

sudo usermod -a -G jator emby

However I'm still getting the same error.

Thanks for any assistance, if it's not obvious, I'm not as familiar with Linux as I am windows but like to learn (or try to at least) new things.

Jay