I have a problem similar to Permission denied when downloading with transmission deamon, but I see nothing there that would help me resolve things.
My (X86 / 64bit) Ubuntu 16.04 system runs from a 64Gb (msata) SSD, on one of these brilliant fanless mini-desktop machines, to which I added an internal 500Gb sata drive.
According to one of the answers to that earlier question, You should not store user files in the /media folder. But I didn't get any choice about the fact that Ubuntu identifies my sata drive as /media/username/3AE67CF2E67CAFAD (search me where it got that hex string from; I'd rather have something a bit more meaningful!).
In a nutshell, my problem is that I want qBittorrent to download onto the higher-capacity drive. I don't care if by default other apps carry on using the /Download folder on the SSD - I just want control of the qBittorrent output location. But so far all I get is permission errors (access denied) when QBittorrent tries to write to the designated folder (.../3AE67CF2E67CAFAD/download2) on the drive I'm trying to use.
I'm not exactly well-versed in Ubuntu/Linux, so if there's a really easy way to resolve things, I'd appreciate that.