If you have a separate user writable drive mounted, you may have encountered the same problem I had. If your DE cannot create
.Trash-$uid, most DEs will not delete files to the trash at all and KDE will copy deleted files to your home partition. I find both behaviors frustrating.
The solution is rather simple: look at the spec and create the trash directory manually.
# for example, your drive is mounted to /media/external # go to the drive root cd /media/external # create root owned .Trash sudo mkdir .Trash # make it world writable with a sticky bit sudo chmod 1777 .Trash
Now delete some file from that partition and check that is lands to
.Trash/$uid/files. Your trash directory now works properly.