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AccessData Custom Content Image

Unknown

archive

The AccessData Custom Content Image (AD1) file format is a file-level disk image format created by AccessData's proprietary forensic software, such as FTK Imager. An AD1 image may span multiple files, with multipart files distinguished by their incrementing file extension, e.g. .ad1, .ad2, .ad3, etc.

Identify it

Extensions	`.ad1.ad2.ad3.ad4.ad5`
Signatures	`41445345474d454e54454446494c45` at byte 0 (AD1)
PRONOM	`fmt/842`
Wikidata	`Q62484348`

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0

Sources

From PRONOM, Wikidata. Updated 2026-10-20.

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