---
type: lookup
id: bac-42-41-43-4b-4d-49-4b-45-44-49-53-4b
asset: file-format-signatures
title: "42 41 43 4B 4D 49 4B 45 44 49 53 4B — File format magic numbers"
sources:
  - https://en.wikipedia.org/wiki/List_of_file_signatures
source_quote: "<https://en.wikipedia.org/wiki/AmiBack?action=edit&redlink=1> AmiBack <https://en.wikipedia.org/wiki/Amiga> Amiga <https://en.wikipedia.org/wiki/Backup> Backup data file"
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-08-03
hex_signature: "42 41 43 4B 4D 49 4B 45 44 49 53 4B"
offset: "0"
extension: "bac"
format: "AmiBack Amiga Backup data file"
unverified_fields: extension, format, hex_signature, offset
---
**Hex signature:** 42 41 43 4B 4D 49 4B 45 44 49 53 4B

**Offset:** 0

**Extension:** bac

**Format:** AmiBack Amiga Backup data file

> <https://en.wikipedia.org/wiki/AmiBack?action=edit&redlink=1> AmiBack <https://en.wikipedia.org/wiki/Amiga> Amiga <https://en.wikipedia.org/wiki/Backup> Backup data file

Source: <https://en.wikipedia.org/wiki/List_of_file_signatures>