I just installed Ubuntu 16.04 LTS on my notebook (ASUS ZenBook UX303U). Whenever I try to "Move to Trash" a file it appears a window asking «“MyFile” can't be put in the trash. Do you want to delete it immediately?».
Consider I already used Ubuntu 16.04 LTS for long in another partition of the same notebook, and it gave me no such problem.
I feel like it can be a permission problem, but I don't really know how to fix this!