Hi,

if you disable the Clean-Up options under

Tools -> options -> Feeds -> Clean-Up

all data will remain in the database (feeds.db).

Please be aware that the db size will increase over a long duration and that might slow down QuiteRss.

Alternatively you can create a backup of the file feeds.db on a regular base before the news are deleted.
This backup should include the file QuiteRss.ini holding the settings.

Kind regards,

Sheldon