Download and Upload progress bar

Is your feature request related to a problem? Please describe.
I downloaded a 4Gb json file from a blob storage. It took about 4 hours, even though the internet connection is quite high (arount 80mbps), which should have downloaded in less than 10 minutes. In previous attemps, it only downloaded only 800 mb, and there was no message that the download failed.

Describe the solution you'd like
There should be a progress bar for uploading and downloading, showing, not only advance percentage but also how many bytes out of the total bytes have been downloaded (in bytes and also in mb or gb according to the most convenience magnitude). In the end we should be able to see also xxx bytes/xxx bytes downloaded.

So it should be something like

|||||||||||||||||||||||||---45%----------------| 1.576.892 B/3.504.206 B (1.50MB/3.34MB)

then..

Successfully downloaded 3.504.206 B/3.504.206 B (3.34MB/3.34MB)

Or

Download was incomplete. 1.576.892 B/3.504.206 B (1.50MB/3.34MB) (45%)

Describe alternatives you've considered
None.

Additional context
I wonder why the download is so slow and unreliable. Is there any hash verification?

The issue names no files or tests; start by tracing Azure Storage Explorer's upload and download flows for blob storage. Identify where transfer progress and completion or failure are surfaced. Done should include percentage and transferred-versus-total byte counts for both uploads and downloads, including incomplete transfers.