Disclaimer: Modifying Samsung devices carries risks, including permanent damage and voided warranties. This guide is for informational purposes only. Proceed at your own risk.
The word "hard" in this context usually implies a degree of difficulty or urgency. It suggests "hard flashing"—the process of forcefully overwriting system partitions to fix a "hard brick" (a phone that won't turn on at all) or to downgrade software versions that normal over-the-air (OTA) updates won't allow. samsung hard downloader