Are deleted bibs, mfhds, items archived?

For WebAdmin users: files by the same name are available under System Admin > Report Files.

There is only ever 1 actively used delete* file. Once (for example) an extension is added to the filename, Voyager will no longer add records to it, and will create a new delete* file starting at 0.
New deletes are added to the bottom of the files.
The date that the bib, mfhd, auth (i.e. MARC records) was deleted is stored in the 005.
The MARC records (deleted.auth.marc, deleted.bib.marc and deleted.mfhd.marc) are stored in the UTF-8 encoding character set.
The bibs and authorities files can be downloaded to a PC, and viewed with Voyager Cataloging or using a bib utilities program such as MarcEdit.
The delete.item is a comma delimited file. See the Technical User's Guide for the Item Delete Standard Interface File (Item Delete SIF).
A good Best Practice is to check delete.item, deleted.mfhd, deleted.bib, and deleted.auth files regularly and rename them before the filesize reaches the Voyager 2 GB filesize limitation. See: Archiving Voyager Record Deletion Files
Note that if you have Primo, the Primo Extract will process and datestamp your delete* files. See: Why do we have so many record delete files in our /rpt directory?