To find Fortbyte number 80 of the decryption challenge, head for the volcano (or rather what remains of it after the eruption), equip yourself with the bunker basher pickaxe (tier 38 of the battle pass) and go to the top of the crater in the upper right part of the volcano on the map. (see video above).
There, at the edge of the crater, a very small rock awaits you that can be difficult to see from afar, destroy it with the bunker basher pickaxe to discover the chip.
Written by Augustin "TheGreatReview" Héliot. Translated from French by Millenium.us.org.