If there are multiple levels of backup, the first backup becomes responsible for the data; the second backup becomes the new first backup, and so on.
Ọ bụrụ na a na-agbanwe n'usoro okpukpu ọtụtụ kọlụm, kọlụm mbụ nke ihe ndị ahụ na-aghọ nke mbụ n'usoro ihe ọhụrụ ahụ, kọlụm nke abụọ nke ihe ndị ahụ na-aghọ nke abụọ nke usoro ọhụrụ, na ihe ndị ọzọ.