Are you doing personal file storage, or is this for backups from a server? If it’s the latter case, and if your use case would benefit from deduplication, you could just stay on Backblaze and use something like Duplicacy (available as a free CLI app or paid web UI) to deduplicate and encrypt your files. This is the approach that I use for my homelab. The only issue you run into is that, in the case of Duplicacy, you have to use the CLI or web UI to restore your files (and god help you if you lose your keys).