Point SparkBox at the movies & photos you already have on your UGREEN NAS

You already have a stack of movies, shows, and photos sitting on your UGREEN NAS — and you want SparkBox's apps (Jellyfin, Plex, Sonarr, Radarr) to use them instead of starting from scratch. This guide shows you exactly how: tell SparkBox where your media lives, then give the apps permission to read it — without changing who owns your files, so your NAS's own file manager and photo app keep working.

Why SparkBox doesn't see your media yet

Two things usually get in the way, and they stack up:

• SparkBox doesn't know where to look. It doesn't auto-scan every folder on your NAS. There's one setting — called MEDIA_ROOT — that tells it which folder your library lives in. Until you point that at your existing media, the apps only see the empty folders SparkBox made for itself.
• The apps aren't allowed to read your files. SparkBox's media apps run as a dedicated background user (you'll see it called user abc or "user id 1000" in messages). But the movies and photos your UGREEN NAS created are owned by a different user, and UGOS (the NAS's own software) adds its own permission layer on top. So even when SparkBox is looking at the right folder, the apps hit a wall: Jellyfin shows an empty library, and Sonarr/Radarr say "folder is not writable or readable."

Both are quick to fix. Let's do them in order.

1. Find where your media lives

On a UGREEN NAS, the folders you create (called "shared folders" in UGOS) live under a path that starts with /volume1/. So if you made a shared folder called Media, its real path is:

/volume1/Media

If you're not sure of the exact name, open the UGOS web interface, go to the Files app, and note the name of the shared folder that holds your movies/photos. The path is just /volume1/ followed by that name. (If you have more than one storage pool it might be /volume2/, /volume3/, and so on.)

Whitespace tip: SparkBox can't use a media path with a space in it (e.g. /volume1/My Movies). If yours has a space, rename the shared folder to one without spaces (e.g. Movies) before continuing.

2. Point SparkBox at it (MEDIA_ROOT)

SparkBox keeps its settings in a file at /opt/sparkbox/.env. You're going to set MEDIA_ROOT to the folder you found above.

Open a terminal on your NAS (SSH in), then run this — replacing /volume1/Media with your actual folder:

sudo sed -i 's|^MEDIA_ROOT=.*|MEDIA_ROOT=/volume1/Media|' /opt/sparkbox/.env

Then apply it:

sudo sparkbox up

This restarts the media apps pointing at your existing folder. sparkbox up also runs a quick check and will tell you in plain English if the apps still can't read your files — which leads us to the next step.

3. Let the apps read your files

This is the step almost everyone needs on a UGREEN NAS, and it's the one that fixes the "empty library" problem. You're going to grant read access to your media so SparkBox's apps can see it — without changing who owns the files. That last part matters: it means UGOS's own Files app, photo app, and sharing keep working exactly as before.

Run this one command (replace the path with your MEDIA_ROOT):

sudo chmod -R o+rX /volume1/Media

In plain English, that says: "let everyone read the files, and let everyone open the folders to look inside." It does not change ownership, delete anything, or hand control to SparkBox — it only adds read permission on top of what's already there. On a big library this can take a few minutes the first time; that's normal.

Then nudge the apps to re-scan:

sudo sparkbox up

The capital X in o+rX is deliberate — it adds "open the folder" permission to folders but doesn't make your actual media files executable. Use it exactly as written.

4. Want the apps to organize/rename too?

Reading is all you need for streaming in Jellyfin/Plex, and it's enough for Sonarr/Radarr to copy new downloads in next to your existing media. But if you want Sonarr/Radarr to also move, rename, or hardlink your existing files (their tidy-up features), the apps need write access too — and we still don't want to take ownership away from UGOS.

The clean way to do that is to grant the apps' user (id 1000 by default) write access without changing the owner:

sudo setfacl -R -m u:1000:rwX -d -m u:1000:rwX /volume1/Media

That gives the SparkBox apps full read/write on your library while leaving your files owned by your UGOS user. The -d part makes it apply to new files too, so anything the apps add later inherits the same access. If your SparkBox shows a different "PUID" than 1000 (check /opt/sparkbox/.env), use that number instead.

If setfacl isn't installed, you can add it with sudo apt-get install -y acl.

5. How you'll know it worked

• Jellyfin/Plex: add a library pointed at /data (that's how your MEDIA_ROOT appears inside the apps), trigger a scan, and your existing movies and shows show up — posters and all.
• Sonarr/Radarr: when you set the root folder, the "not writable or readable" warning is gone.
• From the terminal, SparkBox can check for you:

  sudo sparkbox check-media-perms

  A green "your apps can read your existing media" line means you're done. If it still flags a folder, it prints the exact command to fix it.

Troubleshooting

• Still empty after the chmod? Make sure MEDIA_ROOT in /opt/sparkbox/.env really points at the folder with your media (not the empty default), then run sudo sparkbox up again. Run sudo sparkbox doctor for a full read-out of what it sees.
• The honest UGOS caveat: UGREEN's UGOS adds a proprietary permission layer (its own ACLs) on top of standard Linux permissions. The chmod -R o+rX command above grants read access at the standard layer that every app — including SparkBox's — respects, which is why it's the reliable fix. If you've done custom permission tinkering inside UGOS and still hit a wall, post in d/sparkbox with the output of sudo sparkbox check-media-perms and we'll sort it.
• Don't run chown on your media. You might see chown suggested elsewhere for permission problems — but on existing UGOS media it changes who owns your files, which can break UGOS's own Files and photo apps. The chmod o+rX approach above gets the apps reading without that risk. Save chown for empty folders SparkBox created.

Next steps