

That usually means something has changed with the storage, I’d bet there is a lingering reference in the .conf to the old mount.
The easiest? Just delete the container, start clean. Thats what nice about containers by the way! The harder would be mounting the filesystem of the container, and taking a look at some logs. Which route do you want to go?
For the VM, its really easy. Go to the VM, and open up the console. If you’re logging in as root, commands as is, if you’re logging in as a user, we’ll need to add a sudo in there (and maybe install some packages / add the user to the sudoers group)
- Update your packages -
apt update && apt upgrade - Install the nfs tools -
apt install nfs-common - Create your directory where you’re going to mount it
mkdir /mnt/NameYourMount - Lets mount it to test -
sudo mount -t nfs 192.168.1.100:/share/dir /mnt/NameYourMount - List out the files and make sure its working -
ls -la /mnt/NameYourMount. If you have an issue here, pause and come back and we’ll see whats going on. - If it looks good, lets make it permanent -
nano /etc/fstab - Add this line, edited as appropriate
192.168.1.100:/share/dir /mnt/NameYourMount nfs defaults,x-systemd.automount,x-systemd.requires=network-online.target 0 0 - Save and close -
ctrl+xtheny - Reboot your VM, then login again and
ls -la /mnt/NameYourMountto confirm you’re all set

Great!
Transcoding we should be able to sort out pretty easily. How did you make the lxc? Was it manual, did you use one of the proxmox community scripts, etc?
For transferring all your JF goodies over, there are a few ways you can do it.
If both are on the NAS, I believe you said you have a synology. You can go to the browser and go to http://nasip:5000/ and just copy around what you want if its stored on the NAS as a mount and not inside the container. If its inside the container only its going to be a bit trickier, like mounting the host as a volume on the container, copying to that mount, then moving around. But even Jellyfin says its complex - https://jellyfin.org/docs/general/administration/migrate/ - so be aware that could be rough.
The other option is to bring your docker container over to the new VM, but then you’ve got a new complication in needing to pass through your GPU entirely rather than giving the lxc access to the hosts resource, which is much simpler IMO.