With Couchdrop you can turn you Backblaze B2 bucket into a SCP and Rsync server simply by linking it as a storage provider to your Couchdrop account. Once linked, you can transfer files to and from your Backblaze with SCP and Rsync on any server without having to install any additional software.
To use a Backblaze B2 bucket, first you must have an account. Head here to register for an account.
Once you have registered an account, login and navigate to B2 Cloud Storage Buckets, then Create a Bucket.
Give your bucket a meaningful name, and decide whether it is private or public
Once created you should now see it show up, take note of the Bucket ID you will need this for when you integrate with Couchdrop
Select Show Account ID and Application Key, once this has opened, Create a new Master Application Key. Take note of your account ID and Application key, as you will need these along with your bucket ID for the Couchdrop integration.
Head back to my.couchdrop.io/buckets and click on Add Bucket. Select Backblaze as your Bucket Type and where required, paste your Account ID, Application Key and Bucket ID, then save settings.
All done, you can now use Backblaze B2 storage with Couchdrop. You will find your files on Backblaze within Browse Files -> Bucket. See below for an example of both SCP and Rsync: