I installed on my Raspberry pi 3 running on Debian the headless version of transmission:

```
sudo apt-get install transmission-daemon

```

After this I stopped the service and I modified the settings:

```
sudo service transmission-daemon stop
sudo nano /etc/transmission-daemon/settings.json

```

Beyond changing user and password I changed also the download directory:

```
...
"download-dir": "/home/pi/Desktop",
...

```

After this I rebooted the service

```
sudo service transmission-daemon start

```

Now if I try to download any file I obtain the following error:

```
Error: Permission denied (/home/pi/Desktop/ubuntu-17.04-desktop-amd64.iso)

```

I don't see what I've done wrong.