Upgrading your firmware via unofficial methods carries inherent risks. You must prepare your device properly to avoid permanent bricking.
For users who may not receive the OTA update or prefer manual updating:
Before diving into firmware, it's important to know what the SM-G530H is. It's the dual-SIM variant of the Galaxy Grand Prime, and many unofficial sources incorrectly list it as the "SM-G530H Duos". The device was announced in September 2014 and released the following month. It came with these key specifications: