> For the complete documentation index, see [llms.txt](https://mostafaznv.gitbook.io/larupload/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mostafaznv.gitbook.io/larupload/advanced-usage/concepts.md).

# Concepts

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All files are being uploaded in `original` style. you can add other styles, but the original file is being uploaded as original format.
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Larupload stores additional information such as `name`, `size`, `format` and... in database. if you create attachment in `HEAVY` mode, Larupload will create a column for each of this information. it's recommended when you want to search/order data by their information. but in `LIGHT` mode, all this information will store in a json column.
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