Wiktionary
closed files
n. (closed file English)
Usage examples of "closed files".
The folder, thickened now with additional papers, would go into the closed files.
Fifteen minutes later, he e-mailed the report to Thames House, and then printed it up for the Sali file, which would in due course go to the closed files in Central Records, probably never to be heard from again.
The second gun fired, smashing the nearer column again, plucking men out of the ranks so that the men behind stepped over the carnage and closed files, and still the columns came on.
It requested certain additional personal data and then had Larry select an identification phrase as his personal key to classified material and other closed files.
Hannah Kopec, Simon Rosenthal and Professor Scott Bradley would become closed files.