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The archive.dat file format is used to store PS3, PS4 and PS5 [[Backup And Restore]] (BAR) data.
== Archive.dat ==
Archive.dat in PS3 was the index file in PS4 this seems not to be the case
Archive.dat might represent Archive00.dat from ps3 backups
(Encrypted with idps?)
location: [USBDRIVE]/PS4/EXPORT/BACKUP/201503180030_00/archive.dat


See also [https://www.psdevwiki.com/ps3/Archive.dat PS3 archive.dat] and [https://www.psdevwiki.com/ps5/Archive.dat PS5 archive.dat].
== ArchiveXXXX.dat ==
 
location : [USBDRIVE]/PS4/EXPORT/BACKUP/YYYYMMDDTTTT_00/archviexxxx.dat
= Files =
 
PS4 BAR files are similar in all ways to PS3 ones except that there is no index file. Indeed, archive.dat in PS3 was the index file. PS4 archive.dat might represent PS3 archive00.dat.
 
* /dev_usb0/PS4/Export/YYYYMMDDTTTT_00/archive.dat << This is the starting index which might be an encrypted index after the files have been added >>
* /dev_usb0/PS4/Export/YYYYMMDDTTTT_00/archiveXXXX.dat << the rest of your backup will go here til archive9999.dat >>
 
Remark: << The "_00" suffix in the "YYYYMMDDTTTT_00" directory name pattern might imply that if a certain amount of data is reached on the backup leading to overflow of 9999 in the filename archive9999.dat then another directory named "YYYYMMMDDTTT_01" would be created.
 
== archive.dat ==
 
* It may be encrypted with the PS4 [[Console ID]] similarly to the PS3.
 
=== Location ====
 
* [USBDRIVE]/PS4/EXPORT/BACKUP/201503180030_00/archive.dat
 
== archiveXXXX.dat ==
 
=== Location ===
 
* [USBDRIVE]/PS4/EXPORT/BACKUP/YYYYMMDDTTTT_00/archiveXXXX.dat


=== Example ===
=== Example ===
   Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
   Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
   00000000  53 43 45 43 41 46 00 00 01 00 00 00 00 00 00 00  SCECAF..........
   00000000  53 43 45 43 41 46 00 00 01 00 00 00 00 00 00 00  SCECAF..........
Line 160: Line 141:
   BF6A9FC0  A6 13 79 F3 BE E6 80 84 38 81 CC 9E D3 46 BD 8B  ¦.yó¾æ€„8.ÌžÓF½‹
   BF6A9FC0  A6 13 79 F3 BE E6 80 84 38 81 CC 9E D3 46 BD 8B  ¦.yó¾æ€„8.ÌžÓF½‹


= Tools =
* [https://github.com/xXxTheDarkprogramerxXx/BAR BAR decrypt (and encrypt?) command-line utility by zecoxao (2020-03-26)]


{{File Formats}}
{{File Formats}}
<noinclude>[[Category:Main]]</noinclude>
<noinclude>[[Category:Main]]</noinclude>
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