Backblaze B2 upload and some UI/UX feedback

[Tony]

Answered in your other thread:

B2 (Backblaze) upload

Hi, Yes, B2 supports upload, but they have a mandatory SHA-1 hash requirement. This is fine, but they also require the hash to be sent at the beginning of the upload, which means it needs to be calculated and stored beforehand. Ideally the hash could be sent at the end of the request, so that it can be calculated on-the-fly, during transmission. Our general sync transfer mechanism inserts these processing steps in-line, as we transmit (stream). We need B2 to accept the hash after upload, rathe…