New
#11
1. Instead of using drag/drop or copy/paste I suggest to use Move to folder/Copy to folder. Then you cannot make the mistake of moving stuff to the Lbrary for which it is not designed.
2. A library is an index of folders - not a file or folder. If you have only a single folder in the library, it may appear that Library = Folder. But that is not the itent and maybe considered a design flaw - because if you have several folders in a library (which is probably the more frequent case) moving or copying something to the "library" is definitely not going to accomplish the intent.