# 42 41 43 4B 4D 49 4B 45 44 49 53 4B — File format magic numbers

For 42 41 43 4B 4D 49 4B 45 44 49 53 4B, offset is 0; extension is bac; format is AmiBack Amiga Backup data file, recorded from its source on 2026-08-03.

- **Hex signature:** 42 41 43 4B 4D 49 4B 45 44 49 53 4B _(unconfirmed — we could not tie this to the quote below)_
- **Offset:** 0 _(unconfirmed — we could not tie this to the quote below)_
- **Extension:** bac _(unconfirmed — we could not tie this to the quote below)_
- **Format:** AmiBack Amiga Backup data file _(unconfirmed — we could not tie this to the quote below)_

## What the source says

> <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

Last verified: 2026-08-03. Review by: 2027-08-03.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).