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Most businesses need to send files via sFTP for various reasons. I am not sure why Dropbox does not provide SSH as an option to upload and/or download files.
I am LITERALLY in the process of trying to piece together a convoluted process to be able to SFTP or FTPS images from events to -- eventually -- each client's dropbox folder. In fact, I came to the community today to see if anyone has dropbox watching a Synology folder to automatically grab images that appear.
It would be frickin' awesome to have that functionality within dropbox....