Cannot configure External Storages to use SFTP RSA Private or Public keys

Howdy,

Attempting to configure the external storage app so I can set up automatic backups. I only want to use RSA keys for security reasons but I seem to be unable to use either the RSA Private or Public keys. Just says the configuration is wrong with no clarification about what is wrong. Can’t find anything in the logs either. The configuration documents leave me with little as well.

Hope someone knows what may be wrong…