Upload files to Amazon S3 or Digital Ocean Spaces

I’d like files uploaded directly to Amazon S3 or to DigitalOcean Spaces as opposed to a local folder within my site directory.

My reason for wanting to do this is that I’d like for uploaded files to be encrypted at rest and I believe Amazon S3 and DigitalOcean Spaces (or DigitalOcean Block Storage Volumes) offers encryption at rest out of the box.

Is there a way that I can set my upload path to a folder that is outside of my site directory?

Thanks!