
Samsung Galaxy A8(2018)
Every official firmware build for SM-A530X, newest first: one row per build with all regions (CSC) that received it.
Box codes of SM-A530X for different colors and markets. Firmware is chosen by the model code SM-A530X and your region (CSC), not by the SKU.

SM-A530W

SM-A536V

SM-A526N

SM-A520X

SM-A546S
You can find the firmware on the model: SM-A530X page.
Yes, all firmware files for SM-A530X are 100% official, original, and obtained directly from Samsung servers.
To flash SM-A530X, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SM-A530X.