
Samsung Galaxy A3 (2017)
The latest firmware for Samsung Galaxy A3 (2017) (SM-A320Y) is A320YDXS8CTJ3 with Android 8.0.0 (Oreo), released on November 18, 2020 for 9 regions (CSC). Every official firmware build for SM-A320Y, 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/A320YDXS8CTJ3
SM-A320Y started on Android 6 and has received 2 major Android upgrades; it now runs Android 8.0.0 (Oreo). The newest build, A320YDXS8CTJ3, was released on November 18, 2020. No new build has appeared for 72 months, so regular updates for this model have most likely ended.
Specifications of SM-A320, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.
· Device stability improvements, bug fixes.
· New and / or enhanced features.
· Further improvements to performance.

SM-A320X

SM-A326K

SM-A325N

SM-A310X

SM-A336N
The newest firmware for SM-A320Y runs Android 8.0.0 (Oreo): build A320YDXS8CTJ3, released on November 18, 2020.
The latest build for SM-A320Y, A320YDXS8CTJ3, was released on November 18, 2020 (5 years ago).
SM-A320Y has had no new firmware for 72 months, so regular updates have most likely ended.
Yes, all firmware files for SM-A320Y are 100% official, original, and obtained directly from Samsung servers.
To flash SM-A320Y, 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-A320Y.