Here’s a comprehensive content piece tailored for a tech support blog, driver website, or product FAQ section regarding the driver download. RTL9210B-CG Driver Download: Installation Guide & Troubleshooting The RTL9210B-CG is a highly popular USB 3.1 to PCIe/NVMe bridge controller chip manufactured by Realtek . You’ll typically find this chip inside external NVMe SSD enclosures, USB-C docking stations, and portable M.2 SSD adapters.