You are correct. (In the United States at least.) > [...] maintain books and records by using an electronic storage system that either images their hardcopy (p

You are correct. (In the United States at least.) > [...] maintain books and records by using an electronic storage system that either images their hardcopy (paper) books and records, or transfers their computerized books and records, to an electronic storage media, such as an optical disk. https://www.irs.gov/pub/irs-tege/rp-97-22.pdf https://www.irs.gov/pub/irs-tege/rp-97-22.pdf