You can upload up to 96T using a Backblaze Fireball for $500. With HashBackup (I'm the author) you would connect the Fireball to your network, setup the networ

You can upload up to 96T using a Backblaze Fireball for $500. With HashBackup (I'm the author) you would connect the Fireball to your network, setup the network shared directory as explained on Backblaze's site, and use a HashBackup "Dir" destination to create your backup. Then return it to Backblaze. After the data is loaded into your B2 bucket, change the HashBackup destination type to a "B2" destination, add your B2 credentials, and you're done. The backup can now be accessed by HB as if it were uploaded directly to B2.