Extdata - Revision history

TimmSkiller: /* Quota File */

2026-05-28T07:34:23Z

Quota File

← Older revision		Revision as of 11:34, 28 May 2026
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	\| 0x30		\| 0x30
	\| 8		\| 8
	\| File ID that is related to the above operation info. Same as the one in [[Inner_FAT#Filesystem Header]]		\| File ID that is related to the above operation info. Same as the one in [[Inner_FAT#Filesystem Header\|Filesystem Header]]
	\|-		\|-
	\| 0x38		\| 0x38

TimmSkiller: /* Quota File */

2026-05-28T07:33:52Z

Quota File

← Older revision		Revision as of 11:33, 28 May 2026
Line 111:		Line 111:
	** This includes the initial physical subdirectory (00000000).		** This includes the initial physical subdirectory (00000000).
	* Each physical subfile (= full DIFF container for a virtual file) counts its file size (rounded up to the quota block size) in blocks towards the block quota.		* Each physical subfile (= full DIFF container for a virtual file) counts its file size (rounded up to the quota block size) in blocks towards the block quota.
	** This includes all initial physical subfiles, namely `icon` and the root EXSV filesystem file containing the [[Inner_FAT#Filesystem Header]].		** This includes all initial physical subfiles, namely <code>icon</code> and the root EXSV filesystem file containing the [[Inner_FAT#Filesystem Header\|Filesystem Header]].
	** The physical subfile size is taken as the number of blocks corresponding to the physical subfile size rounded up to the block size as specified in the Quota.dat.		** The physical subfile size is taken as the number of blocks corresponding to the physical subfile size rounded up to the block size as specified in the Quota.dat.
	* Quota.dat itself is given one block.		* Quota.dat itself is given one block.

TimmSkiller: Complete documentation of Quota.dat

2026-05-27T11:56:30Z

Complete documentation of Quota.dat

← Older revision		Revision as of 15:56, 27 May 2026
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	== Quota File ==		== Quota File ==

	The inner data of <code>Quota.dat</code> is 0x48 bytes with the following format. The file ~~seems~~ to ~~limit~~ the ~~extdata total size~~.		The inner data of <code>Quota.dat</code> is 0x48 bytes with the following format. The file applies limits to the file system, similar to quotas for other file systems.

	{\| class="wikitable" border="1"		{\| class="wikitable" border="1"
Line 47:		Line 47:
	\| 0x04		\| 0x04
	\| 4		\| 4
	\| ~~Magic~~ 0x30000		\| Version, always 0x30000
	\|-		\|-
	\| 0x08		\| 0x08
	\| 4		\| 4
	\| 0x1000~~, block size~~		\| Block size. Always 0x1000.
	\|-		\|-
	\| 0x0C		\| 0x0C
	\| 4		\| 4
	\| Always 126~~. Probably device directory capacity~~. See ~~the~~ [[#Device Directory Capacity]] more information.		\| Maximum number of physical files in each physical directory. Always 126. See [[#Device Directory Capacity]] for more information.
	\|-		\|-
	\| 0x10		\| 0x10
	\| 4		\| 4
	\| ~~Always 0?~~		\| padding
	\|-		\|-
	\| 0x14		\| 0x14
			\| 8
			\| Block count (capacity)
			\|-
			\| 0x1C
			\| 8
			\| Number of remaining blocks
			\|-
			\| 0x24
	\| 4		\| 4
	\| ~~Max number of blocks~~		\| Current pending operation
			{\| class="wikitable" border="1"
			! Value !! Description
	\|-		\|-
	\| ~~0x18~~		\| 0 \|\| No pending operation.
	\| 4		\|-
	\| ~~Always 0?~~		\| 1 \|\| Physical file deletion is pending
	\|-		\|-
	\| ~~0x1C~~		\| 2 \|\| Physical file resize is pending (redundant, see below note)
	\| 4
	\| ~~Free blocks remained~~
	\|-		\|-
	\| ~~0x20~~		\| 3 \|\| Physical subdirectory creation is pending
	\| 4
	\| ~~Always 0?~~
	\|-		\|-
	\| ~~0x24~~		\| 4 \|\| Physical subdirectory deletion is pending
	\| 4		\|}
	\| ~~Always 0?~~
	\|-		\|-
	\| 0x28		\| 0x28
	\| 4		\| 8
	\| ~~Free~~ blocks ~~remained +~~ (~~blocks occupied by~~ the ~~recently mounted file, specified by~~ the ~~ID below~~ (0 if ~~recently deleted)~~)		\| Number of available blocks (from offset 0x1C) at the time the above operation was queued (if any).
	\|-
	~~\| 0x2C~~
	~~\| 4~~
	~~\| Always 0?~~
	\|-		\|-
	\| 0x30		\| 0x30
	\| 4		\| 8
	\| ID ~~of most recently mounted file~~. Same as the one in [[Inner_FAT#Filesystem Header]]		\| File ID that is related to the above operation info. Same as the one in [[Inner_FAT#Filesystem Header]]
	\|-
	~~\| 0x34~~
	~~\| 4~~
	~~\| Always 0?~~
	\|-		\|-
	\| 0x38		\| 0x38
	\| 4		\| 8
	\| ~~Always 0?~~		\| File size of the above mentioned file. For resize, this is interpreted as the old file size.
	\|-
	~~\| 0x3C~~
	~~\| 4~~
	~~\| Always 0?~~
	\|-		\|-
	\| 0x40		\| 0x40
	\| 4		\| 8
	\| ~~Size in bytes of most recently mounted~~ file ~~(device~~ file ~~size)~~. ~~0 if recently deleted~~		\| For resize operations, the new file size to apply for the above mentioned file.
	\|-		\|-
	~~\| 0x44~~
	~~\| 4~~
	~~\| Always 0?~~
	\|}		\|}

			The quota is implemented as follows:

			* During initial Extdata creation with [[FS:CreateExtSaveData]], the input size limit is divided by the block size (0x1000). This becomes the block count (capacity).
			* Each physical subdirectory (not to be confused with the inner virtual directories in the EXSV filesystem) counts one block towards the block quota.
			** Every 126 files, a new physical subdirectory is created.
			** This includes the initial physical subdirectory (00000000).
			* Each physical subfile (= full DIFF container for a virtual file) counts its file size (rounded up to the quota block size) in blocks towards the block quota.
			** This includes all initial physical subfiles, namely `icon` and the root EXSV filesystem file containing the [[Inner_FAT#Filesystem Header]].
			** The physical subfile size is taken as the number of blocks corresponding to the physical subfile size rounded up to the block size as specified in the Quota.dat.
			* Quota.dat itself is given one block.

			Note: Extdata files do not support resizing after their initial creation, because each file is a separate, fixed-size DIFF container. The resize operation is therefore nonfunctional.

	== Device Directory Capacity ==		== Device Directory Capacity ==

TimmSkiller: Undo revision 23773 by TimmSkiller (talk)

2026-05-27T11:56:09Z

Undo revision 23773 by TimmSkiller (talk)

Show changes

TimmSkiller: Complete documentation of Quota.dat

2026-05-27T11:55:33Z

Complete documentation of Quota.dat

Show changes

Mt56: /* SD Extdata */ Add Swapnote JPN ExtdataID

2025-05-03T11:08:09Z

SD Extdata: Add Swapnote JPN ExtdataID

← Older revision		Revision as of 15:08, 3 May 2025
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	\|		\|
	\|-		\|-
	\| ?		\| 00000516
	\| 00000517		\| 00000517
	\| 00000518		\| 00000518

Mt56: /* SD Extdata */ Add Swapdoodle JPN ExtdataID

2025-05-03T10:57:47Z

SD Extdata: Add Swapdoodle JPN ExtdataID

← Older revision		Revision as of 14:57, 3 May 2025
Line 459:		Line 459:
	\|		\|
	\|-		\|-
	\| ?		\| 00001a2c
	\| ?		\| ?
	\| 00001a2e		\| 00001a2e

Meleemeister: /* Tools */

2024-03-22T17:55:07Z

Tools

← Older revision		Revision as of 20:55, 22 March 2024
Line 546:		Line 546:
	Empty space is filled with 0xC-long sequences of 00 00 ... 07		Empty space is filled with 0xC-long sequences of 00 00 ... 07

	=== Tools ===		== Tools ==

	* [https://github.com/wwylele/3ds-save-tool 3ds-save-tool] - Extract/verifies extdata		* [https://github.com/wwylele/3ds-save-tool 3ds-save-tool] - Extract/verifies extdata

Wolfizen: Add ExtID for Animal Crossing: New Leaf - Welcome amiibo USA region

2023-08-26T08:04:55Z

Add ExtID for Animal Crossing: New Leaf - Welcome amiibo USA region

← Older revision		Revision as of 12:04, 26 August 2023
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	\|-		\|-
	\| ?		\| ?
	\| ?		\| 0000198e
	\| 0000198f		\| 0000198f
	\| Animal Crossing: New Leaf - Welcome amiibo		\| Animal Crossing: New Leaf - Welcome amiibo

Wolfizen: Add ExtID for Fantasy Life USA region

2023-08-26T07:33:59Z

Add ExtID for Fantasy Life USA region

← Older revision		Revision as of 11:33, 26 August 2023
Line 376:		Line 376:
	\|-		\|-
	\| ?		\| ?
	\| ?		\| 00001132
	\| 00001131		\| 00001131
	\| Fantasy Life		\| Fantasy Life