make it possible to backup one's own data
Jonathan Lovelace commented
"Exporting" bookmarks, requiring the user to visit a Web page in a browser, use a Web form, wait for an email, open another page in a browser, and click a link, is a very poor substitute for true backup capability. One of the things that Delicious did very well (before Yahoo sold it; I haven't been able to get it to work lately) was that you could use the API to download all your bookmarks, including tags, using a single HTTP(S) request, which could be run automatically every week (for example) from a script.
AdminSandy_diigo (Admin, Diigo ) commented
You can use xml format to export bookmarks,which supports exporting of annotations.We will support importing of annotations in the future as well as develop desktop client. You can import
exported annotations to desktop client. Please rest assured that all your data are safe.
prof.dr. stupid commented
Yes, this would be nice. Maybe a connection to dropbox to do manual/automated backups.
But you can't export your stickies and highlights in the context of the webpage. Should the later ever change its URL, your work is lost. Highlights without context don't usually make much sense.
Susana M commented
what do you mean? this is possible already.
You can export your bookmarks so you can later upload them anywhere.
And using lists you can also save your information and have it ready for printing.