How to free up unused papers from local storage and save them on cloud only?

Zotero is a great tool for managing papers, and I love it very much. But, I find that it consumes a lot of hard drive space because I have saved so much papers in it, many of which are uncommonly used. So, can I free up that papers from local storage and save them on cloud only?

Further more, can zotero free up papers unused recently (like in one to three months) automatically?
  • If you set Zotero to download files "as needed" from the Sync pane of the preferences, it will avoid downloading files added elsewhere until you try to open them.

    An upcoming version of Zotero will also make it possible to set how many days Zotero should keep local copies of uploaded files in order to save disk space.

    For now, though, you can search for large PDF files within your Zotero data directory and delete them manually — just be sure they've been uploaded and are accessible from the web library, which they should be if syncing has been set up and working correctly, but you'd want to double-check. You may want to just wait for the feature above to be available.
  • Thanks for your reply. I'm so glad to hear about it that we will support that feature. But, do you mean Zotero7 by 'An upcoming version of Zotero'? If sure, I can not wait for the brand new Zotero7 to be released.
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