**LG BU40N** is a **9.5mm ultra-slim internal SATA Blu-ray writer**, featuring **BDXL, M‑DISC, 3D Blu-ray playback**, and silent playback. It is ideal for laptop/mini PC upgrades and long-term data archiving. ### I. Basic Info & Appearance - **Type**: Ultra Slim Blu-ray/DVD/CD Writer (Internal SATA) - **Thickness**: 9.5mm (ultra-slim, fits laptops and small cases) - **Interface**: SATA (not USB) - **Weight**: approx. 127g - **Color**: Black ### II. Key Specifications & Performance #### 1. Max Read/Write Speed - **Blu-ray**: BD‑R 6x / BD‑RE 2x / BDXL (100GB) 6x - **DVD**: DVD±R 8x / DVD±RW 6x / DVD‑RAM 5x - **CD**: CD‑R 24x / CD‑RW 16x #### 2. Main Features - **BDXL Support**: writes up to **100GB** triple-layer Blu-ray discs - **M‑DISC Support**: supports millennium-level archival recording (rock‑like material, fade‑resistant) - **3D Blu-ray Playback**: requires 3D software and display device - **Silent Play**: automatic speed reduction for quieter movie viewing - **Super Multi Compatibility**: supports almost all disc formats #### 3. System Compatibility - Native support for **Windows 10/11**; macOS requires third‑party software - No built‑in decoding; playback depends on system/media player software ### III. Recommended Uses - Internal Blu-ray upgrade for laptops and mini PCs - HD movie collection (3D Blu-ray) - Long-term large‑capacity data archiving (BDXL / M‑DISC) ### IV. FAQ - **Can it be used externally?** Yes, with a **SATA to USB 3.0/3.1** optical drive enclosure (power supply required)