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I am not sure what you meant by library. Could you please provide us more information about this?
Were you perhaps looking for a way to display images on a slideshow like matter? You could try checking out the photo/image related widgets that we have on this page: https://widgets.jotform.com/category/photo
To add a widget on your form, you can follow this guide: https://www.jotform.com/help/252-How-to-Add-a-Widget-to-your-Form
If you are looking for a storage for the uploaded files on your forms, then you can try the 3rd party file sharing and storage services that we have integrations with (ex. Dropbox, Google Drive and Box.com), you can check them here: https://apps.jotform.com/category/file_sharing_and_storage. Aside from JotForm's own storage servers, you can integrate those 3rd party apps to your form so that the file uploads will also be directly copied to your external cloud storage.
I hope that helps.