Try to upload files for Airsonic media server, though over the interface as well as over sftp I encounter a write prtection issue: Airsonic - Music media streamer
I also tried this: shutdown the server, removed the sd card from the raspi, connected it to the PC with an usb adapter and tried to move the files manually to the sd card.
What kind of permissions? You might need to add them to the “www-data” group if you want the web UI to be able to access them. Or perhaps you need to allow the ftp user also? Tricky stuff, those permissions
I have a bead running ubuntu 14.04 and a LEMP stack. I have subdomains on the/var/www organizer with each having its very own envelope inside/www. I have one client with root authorizations that is the one that I use for ssh and sftp. When I trie to compose the document by means of sftp I have authorization denied.