I work at Software Heritage, where we archive all source code we can find, including all GitHub repositories, and deduplicate them internally. The size of all

I work at Software Heritage, where we archive all source code we can find, including all GitHub repositories, and deduplicate them internally. The size of all file contents (including older versions of files) is a few hundreds TBs, and everything else (directory structures, revision history, etc.) is under 10TB. So for GitHub alone it would be a little under that