John Smith
Writer, web-designer, creator. Differential backup It differs from the incremental one in that the data is copied from the last moment of the Full backup. In this case, the data is placed in the archive "on an accrual basis". In systems of the Windows family, this effect is achieved by the fact that the archive bit is not cleared during a differential copy, so the changed data is transferred to the archive copy until the full copy zeroes the archive bits.