Organization of the data structure for the backup program, tell me what to read, where to see examples?

Question

Programming

Hello everybody! As part of self-study, I wanted to try to write something applied and necessary. It was decided to try to write a small backup system, hence the question: What options for organizing backup storage exist? Of course, Tar and Zip are known to me, and libraries for working with them exist for all languages, but I would like to understand exactly how to create my own data structures. Maybe someone will tell you where you can see similar and detailed examples, or read about the principles of organizing such data structures?

Answer 1

What "similar"? Like Zip and Tar? Start with their sources.

Answer 2

It is better not to create your own structures, because if the archive is damaged, there may be enough redundant information for recovery, but you are unlikely to have it.
And besides, archivers write for 10/20 years, going through all the rake, but do you need it?