FORWARD This document was prepared by the NATO Advanced Data Storage Interface Custodial Support Team (NADSI CST) in response to user community requests for guidance on proper data purge and sanitization techniques for advanced technology memory systems. In particular@ this document addresses Flash Memory@ Solid State Disks (SSD) and advanced magnetic disks and disk array storage devices used in ISR systems. This information is provided as guidance and national requirements may supersede this document. This edition revises AEDP-3@ edition 2 to address revised NATO directives and instructions@ provide updated procedures for technology changes and to correct terminology. This document provides sanitization procedures and defines sanitization levels for storage media used in ISR acquisition and ground systems. Sanitization is the technical basis for declassification. Declassification policies@ directives and guidance are found in the referenced NATO INFOSEC documents. Questions or comments should be directed to the Custodian of this document. The Custodian is also the Custodian for STANAG 4575. Inquiries can be addressed to: