Remote Document Storage
Question: For documents uploaded using an URL, where are annotations and edits to the document stored?
When uploading a document using an URL we don’t persistently store the PDF file in PSPDFKit Document Engine and will fetch it from the URL when necessary. That being said, any annotations existing in the document upon upload, as well as ones created after upload will be stored in your database the same way they are for documents uploaded directly to PSPDFKit Document Engine.
Furthermore, since document operations or digitally signing modify the underlying PDF file, after using any of these operation the resulting PDF will be stored using your configured storage backend and no longer be fetched from the URL the document was originally uploaded from.