If I force stop an application, will I lose items I've saved within that app?

St205

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Dec 27, 2016
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I write, draw and create (a comic strip, primarily) and have much of the base material saved as clip on/sticker art within the structure of a creative app. Would/could a force stop delete these items? If so, is there a way to extract and save these to another place? If the answer is painfully simple, forgive my ignorance. I'm still quite new to much of the technology. Thanks, in advance.