The NandFiler tool manipulates data in the system memory (NAND). You can use it to delete, browse, and edit photo data as well as the save data of the NAND application stored in Wii system memory. By using an SD Card, you can also use this tool to import and export save data.
Run it in the following ways.
NandFiler.srl
NandFiler.tad
NandFiler.srl to a DS Game Card and then running it
NandFiler.tad
If you are running the TWL Nmenu using the IS-TWL-DEBUGGER software, a "Please wait a moment" dialog box appears, and you will no longer be able to perform operations in the IS-TWL-DEBUGGER software. To exit, click Force Quit in the dialog box.
There are three modes in NandFiler.


The NandFiler tool starts in Filer mode by default.
In Filer mode, after you select either photo data, NAND application save data that has been already imported in the system, or SD Card data, you can browse and operate on that directory tree.
When you are browsing the contents of an SD Card, file and directory names will not appear if they use characters that cannot be converted to Shift_JIS.
The following table shows what operations you can perform.
| Button | Operation |
|---|---|
| SELECT | Displays a list of operations |
| ←→ | Switches pages for the displayed items. |
| ↑↓ | Selects files and so on. |
| A | Confirms an item. |
| B | Cancels the selected archive or file. Moves to the parent directory. |
| X | Opens a submenu when a file or archive is selected. |
This is the state immediately after startup. The left side of the screen displays links to the Game Code of the installed NAND application (blue), and to photo data and the SD Card (purple).
Selecting a Game Code switches to archive selection in the center of the screen. Selecting a link to photo data or an SD Card switches to file selection on the right side of the screen. The following operations can be selected on the submenu displayed by pressing the X Button.
Copies files from the application's save data region or the PHOTO directory to the SD Card.
A directory is created on the SD Card (named either [4-digit game code_4-digit version] or [PHOTO]), and then the data is copied there.
Selecting a Game Code under Title Selection moves here. For Archive Selection, you can choose Public, Private, or SBanner. These are links to the public save data, private save data, and sub-banner of the NAND application selected under Title Selection.
The following operations can be selected on the submenu displayed by pressing the X Button.
However, the Backup and Break features do not exist in the sub-banner submenu.
Backs up save data on the SD card. The data backed up here can be imported using the Restore operation, described below.Backup differs from the Export operation described above in that the entire file system of the save data region is copied to the SD card, but with Export, data is copied in file units.
Destroys the FAT system region of the save data. Use this for debugging an assumed problem with the save data region causing FS_RESULT_BAD_FORMAT to occur.
This tool can restore the destroyed save data region through any of the methods described below.
To restore while the application is running, use NA_FormatTitleArchive.
Initializes the save data and sub-banner. Restoration is possible if save data or sub-banner data becomes invalid using a break.
If PHOTO or SD have been selected under Title Selection, selecting any save data under Archive Selection moves to here.
A list of directories (yellow) and files (white) are displayed under File Selection.
When a directory is selected, press the A Button to browse the contents of that directory. When a file is selected , press the A Button to switch to View mode.
Following is the meaning of the information that is displayed at the top of the screen in File Selection.
| Size | File size. |
| CTime | The time the file was created. |
| MTime | The time the file was last modified. |
| ATime | The time the file was last accessed. |
| Attr | File attributes REA: Read-only files HID: Hidden files SYS: System files VOL: Volume level PRO: Protected files ARC: Archives |
| Very bottom of screen | Full path to the selected file. |
This operation is valid for directories created with the Export operation. Note, however, that exported PHOTO directories cannot be imported.
This operation copies data to the save data region of system memory. Provided the data does not exceed the size of the save data region of system memory, the data copied over by Export can be imported even if they have been altered.
Deletes a file or directory. If a directory is selected, files and directories inside the directory are deleted recursively.
This operation is only valid for save data backup files created using the Backup feature. The backup file on the SD card is imported to system NAND memory.
Note that importing backup files will fail in the cases given below.

The following specifications apply to the display of characters.
0x00 can be replaced by 0x20 (by a space)0x20 to 0x7A conform to ASCII code| Button | Operation |
|---|---|
| ←→ | Scrolls one page at a time. |
| ↑↓ | Scrolls (one line at a time). |
| A | Switches to Edit mode. |
| B | Switches to Filer mode.If file has been edited in Edit mode, it will be saved. |

This state occurs when entering Edit mode.
| Button | Operation |
|---|---|
| ←→↑↓ | Moves the cursor |
| A | Switches to the editing state |
| B | Switches to View mode |
| Button | Operation |
|---|---|
| ←→↑↓ | Moves the cursor |
| B | Switches to the non-editing state |
| L, R | Increase, Decrease value |
Pressing the L or R Buttons in the editing state will change the value at the current cursor position.
Locations where any edits have been made will appear in green. The cursor can be moved freely even in the editing state, but the horizontal range of movement is reduced compared to the non-editing state.
To save edits, select Yes from the choices displayed when you press the B Button in View mode.
$TwlSDK/bin/ARM9-TS/Rom/NandFiler.srl
$TwlSDK/bin/ARM9-TS/Rom/NandFiler.tad
2009/11/30 Deleted the archive selection "Delete" and "Size0" features. There is no longer any need to support these errors.
2009/05/20 Noted that non-Shift_JIS filenames on an SD Card are not displayed; added sub-banners to Archive Selection; and added the Delete, Size0, and Format features.
2009/02/18 Added text related to the Break feature and FS_RESULT_BAD_FORMAT.
2008/01/13 Added text for the Import and Export features.
2008/12/08 Mentioned restrictions when editing.
2008/11/26 Complied with added screenshots and changes to operations.
2008/10/21 Added text for the Backup and Restore features.
2008/09/16 Added text for the Break feature.
2008/07/18 In Location, changed "Release" to "Rom."
2008/07/14 Changed terminology.
2008/07/07 Initial version.
CONFIDENTIAL