Historically, D-Link maintained public FTP servers. Some users have found valid paths like: ftp://ftp.dlink.com/products/dwr-930m/firmware/
Official firmware files are typically hosted on region-specific D-Link servers. Ensure you check the hardware version (H/W) on your device label before downloading: D-Link Southern Africa Support dwr930m firmware link
Before clicking a download link, (under the battery). Look for H/W Ver (e.g., A1, B1, or C1). Historically, D-Link maintained public FTP servers
D-Link has consolidated legacy products. Use this direct method: dwr930m firmware link