Savefile

Flipnote Studio's savefile stores all of the Flipnotes saved under System Memory, as well as the settings and user details.

The savefile can be found stored on the DSi NAND at ⁨title⁩/⁨00030004⁩/<title id>/⁨data/public.sav. Where title ID varies depending on the console's region:

Region	Title ID
Europe	4B475556
Americas	4B475545
Japan	4B47554A

File Structure

public.sav is a FAT12 image (protip: it can be opened as a regular disk .img file) containing the following file structure:

public.sav
├── eula.txt
├── friend.pls
├── latest1.pls
├── mark0.pls
├── mark1.pls
├── mark2.pls
├── mark3.pls
├── nand.pls
├── option.bin
├── recent10.pls
├── remind.pls
└── ugo
    ├── 001
    ├── ...
    └── 032

• eula.txt - Stores a copy of the most recent EULA / Terms of Service from Flipnote Hatena, or whatever third-party replacement service you connected to last. It is plaintext and encoded as little-endian utf-16.

• Any file ending in .pls - This is a playlist file, which are fully documented here. TL;DR these store lists of Flipnote filepaths for various different purposes, such as tracking which ones you added stickers to.

• option.bin - Stores user settings and Flipnote Studio ID. Its structure is partially documented below.

• ugo/... - All of the Flipnotes that you save to System Memory are stored here. The subdirectory (001 to 032) seems to be chosen at random, but that isn't certain.

Option.bin

This file is used to stores user settings like birthday, drawing hand preference, Frog display, the number of pages to show when tracing is enabled, and so on. It also stores the user's Flipnote Studio ID.

Offset	Type	Details
0x0	uint8	App revision; usually 0x02, but if set to 0x01 in the Japanese version the app will show a small introduction to "Version2" on startup
0x1	uint8	Stylus; right hand = 0x00, left hand = 0x01
0x2	uint8	Sound effects; on = 0x00, off = 0x01
0x3	-	Unknown
0x4	uint8	Set to 0x01 if the user has connected online?
0x5	uint8	Introduction tutorial completed; yes = 0x01, no = 0x00
0x6	uint8	Default pen type; 0x00 to 0x0E
0x7	uint8	Default paint type; 0x00 to 0x0E
0x8	uint8	Default eraser type; 0x00 to 0x0E
0x9	uint8	Default state for "Trace" tool; on = 0x01, off = 0x00
0xA	uint8	Default state for "Copy" tool; on = 0x01, off = 0x00
0xB	-	Unknown
0xC	uint8	Advanced tools; on = 0x01, off = 0x00
0xD	uint8	Number of pages to trace
0xE	uint8	Frog display; on = 0x00, off = 0x01
0xF	uint8	Start on calendar; on = 0x01, off = 0x00
0x10	uint64	User's Flipnote Studio ID in little endian byte order
0x18	uint16	Savefile checksum
0x1A	uint16	User's birth year
0x1C	uint8	User's birth month
0x1D	uint8	User's birth day
0x1D-0xFF	-	Always null