Installing incorrect firmware can permanently damage ("brick") your hardware. Before proceeding, ensure this specific version is designed for your exact device model by checking the manufacturer’s support documentation or the device’s current firmware version in its Setup/About menu.

: Firmware updates of this type are usually installed by placing the extracted files on a formatted USB drive or SD card , inserting it into the target device, and selecting a "Software Update" or "System Update" option from the device's settings menu.

Because this is a .rar file (a proprietary Roshal Archive), you will need specific software to access its contents:

QD_0.21e_20220727.rar

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