_update_files_list stalls uploading on any bucket with > 1k files

[kaivi]

What is the point of retrieving a complete file list right after a successful upload? It is this line here.

With a bucket of 500k files, the lib goes through all of them 1k at a time:

[WardPearce]

Hey, might be worth checking out my backblaze b2 wrapper.
I don't believe it has this issue.

https://pypi.org/project/backblaze/
https://backblaze.readthedocs.io/en/latest/index.html
https://github.com/WardPearce/backblaze