Editing Archive.dat

The archive.dat file format is used to store PS5 Backup and Restore (BAR) data. The backup/restore system will create an archive.dat file(s) on a USB drive which will contain a backup of your entire HDD. The structure has changed from it's predecessor and all data stored in here is in little endian format.

== SIECAF File Structure ==
Structure:
* Header
* Repeating Section Meta Blocks
* Repeating Section Hash Blocks

=== Header ===
{| class="wikitable"
|-
! Offset !! Size !! Description
|-
| 0x0 || 0x8 || Magic <code>0x5349454341460000</code> SIECAF\0\0
|-
| 0x8 || 0x8 || Version
|-
| 0x10 || 0x8 || Unknown (0x1)
|-
| 0x18 || 0x8 || Unknown (0x1)
|- 
| 0x20 || 0x10 ||Encryption IV? Since it was removed in the metadata blocks.
|-
| 0x30 || 0x4 || Unknown size
|-
| 0x34 || 0x4 || Unknown size
|-
| 0x38 || 0x4 || Unknown size
|-
| 0x3C || 0x4 || Padding
|-
| 0x40 || 0x8 || Number of Segments
|-
| 0x48 || 0x8 || File Offset
|-
| 0x50 || 0x8 || File Size
|-
|}

=== Section Meta Block ===
{| class="wikitable"
|-
! Offset !! Size !! Description
|-
| 0x0 || 0x8 || Section ID
|-
| 0x8 || 0x8 || Section Start Offset
|-
| 0x10 || 0x8 || Aligned Section Length
|-
| 0x18 || 0x8 || Hash Key ID (0x0000000000000003)
|-
| 0x20 || 0x8 || Encryption Key ID (0x0000000000000001)
|-
| 0x28 || 0x10 || Encryption IV (null bytes)
|-
| 0x38 || 0x8 || Unaligned Section Length
|-
|}

=== Section Hash Block ===
{| class="wikitable"
|-
! Offset !! Size !! Description
|-
| 0x0 || 0x8 || Section ID
|-
| 0x8 || 0x10 || Hash (128-bit)
|-
| 0x18 || 0x18 || Padding
|-
|}

Updating once further research has been made...