I know that the Azure Storage entities (blobs, tables and queues) have a built-in resiliency, meaning that they are replicated to 3 different servers in the same datacenter.
You can make a snapshot of a blog container and then download the snapshot for a point in time backup.
https://docs.microsoft.com/en-us/azure/storage/storage-blob-snapshots
A snapshot is a read-only version of a blob that's taken at a point in time. Snapshots are useful for backing up blobs. After you create a snapshot, you can read, copy, or delete it, but you cannot modify it.+ A snapshot of a blob is identical to its base blob, except that the blob URI has a DateTime value appended to the blob URI to indicate the time at which the snapshot was taken. For example, if a page blob URI is http://storagesample.core.blob.windows.net/mydrives/myvhd, the snapshot URI is similar to http://storagesample.core.blob.windows.net/mydrives/myvhd?snapshot=2011-03-09T01:42:34.9360000Z.