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So, for noone to be able to delete a file, you need to not have the D set in the protection mask, and also, the owner of the file needs to be someone else, or else people can always change the protection to allow the deletion.

All that said, the same applies for modifying a file. For that you need write access.

Now, there is no way for you to allow people to create files remotely on your machine without them also having write access to the files. And besides, naturally they will be the owners of the files if they create them.

The best I can think of here is to just set a default protection so that newly created files at least by default have a protection that don't include D (and possibly exclude both E and W as well).


The second part of this is actually making the files visible in the specific library. For this users need write access to the directory (and possibly extend access). In order to find the files, you need read access. For removing files from a directory, you need write access to the directory.
So obviously, you either allow both entering and removing, or neither.


	Johnny