Satan, who has been thrown down by God from Heaven to the earth, is the accuser of our brothers and sisters, the true disciples of Jesus Christ. He accuses them before our God day and night, reminding Him of all the wrongs they have done. (See Revelation 12:10)
But when we confess our sins to God, He is faithful and just to forgive us our sins and cleanse us from all wickedness and God will never again remember our forgiven sins! (See 1. John 1:9, Hebrews 8:12)
That is why God will not keep a record of the wrongs we have done! (See 1. Corinthians 13:5) Only Satan and his followers do!