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So I am writing an email to my peers. So I wrote: "I am having troubles creating files in my folder". Or it should be "on my folder"?

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closed as general reference by RegDwigнt Jul 10 '12 at 15:30

This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information.If this question can be reworded to fit the rules in the help center, please edit the question.

This question is too basic for this site. Please support the proposed site specifically for English language learners. Thank you. – RegDwigнt Jul 10 '12 at 15:31
A folder can be a physical object, i.e, 2-Dimensional (in which case one uses on), or a container, i.e, metaphorically 3-Dimensional, even if it's all electronic (in which case one uses in). Most prepositions have some particular locative sense which shows up in metaphoric expansions; all containers are 3-D and use in: in the box, in the folder, in trouble, in the soup. – John Lawler Jul 10 '12 at 15:31
@JohnLawler- trouble is not a container, I guess:) – Noah Jul 10 '12 at 15:44

The folder contains the files, so "in my folder" is correct.

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