Hi @towfiqi
I didn’t read the article or can help about the BackBlaze topic. But I am pretty sure that this won’t break an existing restic repo. This is all about how the data is stored and accessed within Backblaze, not at all about the repository. So if this is an issue, it is an issue about breaking access to the repository files. (And as BackBlaze’s business is to provide storage for files and access to them - and you trusted this business by choosing it - you have to trust that they will ensure their business still works after this change 
)