When setting up the container, you need to map the folders so JDownloader can save files to your NAS drive.
If you’re comfortable with SSH, you can install Entware (a package manager) and then install a headless JDownloader. jdownloader qnap
Your /output folder is mapped to a volume that is actually full. Or, JDownloader’s internal temp folder is filling the container image. Fix: In Docker settings, add an environment variable: JDOWNLOADER_DOWNLOAD_DIR=/output and ensure your host folder has enough capacity. When setting up the container, you need to
These packages are often outdated, break with QNAP firmware updates, and lack the easy backup/restore of Docker. Use only if your QNAP is too old for Container Station. Or, JDownloader’s internal temp folder is filling the
JDownloader is Java-based. If your NAS feels sluggish, go to Container Station and set a (e.g., 50%) for the JDownloader container to ensure system stability. If you'd like to dive deeper, let me know: Which QNAP model you have (to check RAM compatibility). If you prefer Docker or a native .qpkg install.