I am backing up my personal photo/video library to Amazon S3 (several hundred GB).
I am currently using Cyberduck on my Mac to drag & drop, but I've already had a few fail without a clear retry/resume behavior.
I'd like to find a way to upload a directory with confidence that they are all transferred completely, and with a clear way to retry/resume any that failed.
What would you recommend? A command line approach is fine.