How are disks arranged?

Question

Data storage

Please tell us how the disks are arranged? For example Yandex Disk, Google Disk.

Answer 1

Briefly: this is a large sector "tree" with replicated "branches" to distribute the load evenly across the "cloud" and ensure fault tolerance.
All duplicate data blocks for different users refer to one unique one.
(a block is a certain sequence of bytes, the concepts of a file at the storage abstraction level are not)