Confluence REST API storage DATA not matching Data from Storages

[olzhas]

Hi team,

Using REST API Finding storage usage of Confluence space and page using REST API | Confluence | Atlassian Documentation 

I could see all storages, however my data is not matching with the image bellow.

I'm expecting that summery of all attachment size (in byte) would be same (227GB) but it's

only 3152281120 bytes which is 2.93579 (GB)

Looking hearing from you,

Thanks