What is the story of collecting the Qur’an during Abu Bakr's era and burning it during ‘Uthman's era?

The Messenger of Allah left the Qur’an documented and written down by the Companions to recite it and teach it to others. When Abu Bakr (may Allah be pleased with him) became the Caliph, he ordered that such scrolls should be collected to be in one place and to be used as a reference. However, during the era of ‘Uthmān, he ordered that the copies and scrolls that were available with the Companions in the various countries and in various dialects be burnt, and he sent them new copies identical with the original copy that was left by the honorable Messenger and collected by Abu Bakr, to ensure that all countries refer to the same original and only copy that was left by the Prophet.