HowToUpgradePfsense_2_3XTo_2_4X
How To Upgrade Pfsense 2 3 X To 2 4 X
https://www.reddit.com/r/PFSENSE/comments/7fyj0z/attempted_update_from_234_to_242_upgrade_failed/
https://www.reddit.com/r/PFSENSE/comments/7fyj0z/attempted_update_from_234_to_242_upgrade_failed/