
Samsung Galaxy A8(2018)
The latest firmware for Samsung Galaxy A8(2018) (SM-A530N) is A530NKSU9CUL1 with Android 9 (Pie), released on January 20, 2022 for 3 regions (CSC). Every official firmware build for SM-A530N, newest first: one row per build with all regions (CSC) that received it.
Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/A530NKSU9CUL1
SM-A530N started on Android 7 and has received 2 major Android upgrades; it now runs Android 9 (Pie). The newest build, A530NKSU9CUL1, was released on January 20, 2022. No new build has appeared for 58 months, so regular updates for this model have most likely ended.
Specifications of SM-A530F, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-A530X

SM-A536V

SM-A526N

SM-A520X

SM-A546S
The newest firmware for SM-A530N runs Android 9 (Pie): build A530NKSU9CUL1, released on January 20, 2022.
The latest build for SM-A530N, A530NKSU9CUL1, was released on January 20, 2022 (4 years ago).
SM-A530N has had no new firmware for 58 months, so regular updates have most likely ended.
Yes, all firmware files for SM-A530N are 100% official, original, and obtained directly from Samsung servers.
To flash SM-A530N, 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-A530N.