somehow I cannot move files to trash. The strange thing is, that it works on the desktop-folder, but in other folders it doesn't. What a tried is a
sudo chown -R wegsehen /home/wegsehen/*
But nothing changed.
Try
sudo chown -R wegsehen:wegsehen /home/wegsehen
No /* on end of line maybe?
try this out, making sure you own your own trash bin.
sudo chown wegsehen:wegsehen ~/.local/share/Trash
You also may want to make sure you own all your files in home
sudo chown wegsehen:wegsehen -R ~/*
And yet still if your using a separate data partition make sure you have ownership of said partition, replacing '/Path/to/your/data/partition' with the actual path to your data partition.
sudo chown wegsehen:wegsehen -R /Path/to/your/data/partition
And yet even still, you want to make sure your data or even home partition is mounted properly by editing your fstab file
sudo apt-get install gksu
gksudo gedit /etc/fstab
Once your fstab is opened your line for the mounting of the data/home partition should look something like this...
/dev/sda5 /media/data ext4 auto,users,rw,noatime 0 0
paying attention to 'auto,users,rw,noatime' the rest of your fstab info will obviously look quite different.