.0 File Extension

You can use Dr. Software Hacha (Windows) to recombine a .0 file and its accompanying split file segments. To do so:

1. Open Hacha and click PEGAR.
2. Navigate to and open your 0 file.
3. Click Pegar Archivos.

Provided all the segments of your split file are stored with your 0 file, Hacha will recombine those segments into the file from which they were split.

The M3 DS Real is a flash cartridge (or flashcart) that Nintendo DS gamers use primarily to play game ROMs on the DS. To do this, players:

1. Install the M3 DS Real's associated firmware.
2. Place one or more game ROMs on the M3 DS Real's microSD card.
3. Insert the M3 DS Real into their Nintendo DS (as they would a game cartridge).
4. Load and play games stored on the M3 DS Real.

The first time that a player starts a game stored on their M3 DS Real, the cartridge creates an accompanying 0 file. As the player progresses through the game, they can save their progress to this 0 file. Doing so allows the player to retain a record of their progress, and to transfer their saved game between cartridges.

NOTE: The G6 DS Real flash cartridge also creates and uses 0 files.

0 files are not meant to be opened on a PC. To use a 0 file with a Nintendo DS, you must place it on an M3 DS Real (by connecting the cartridge's microSD card to your computer, transferring the file to the microSD card, and replacing the microSD card in the M3 DS Real).

You can use Shunyweb Savegames Converter to convert 0 files to several other formats, including the .SAV format.

Intrepid Mario Kart Wii modders found course.0 within the game's koopa_course.szs file. This unusual file was saved in a format not used by any of Mario Kart Wii's other files. The modders soon discovered that the file included an early version of the game's Bowser's Castle racetrack, which had been created in 2007 and not deleted before Mario Kart Wii shipped in 2008.

Modders analyzed course.0 to further their knowledge of how Mario Kart Wii racetracks are developed and created. Some even attempted to convert course.0 into a usable Mario Kart Wii course.

Because course.0 is an incomplete Mario Kart Wii course that is not saved in the KMP file format, it cannot be opened or played in Mario Kart Wii. You can, however, open course.0 in a text editor to view the XML data it contains.

Devices, networks, websites, and applications use digital certificates, issued by certificate authorities (CAs), to identify themselves to each other and confirm you are transmitting information between trusted parties. Sometimes, websites, networks, and applications will require you to download and manually install a digital certificate, so you can securely exchange information.

On Android, some digital certificates are saved as 0 files (others are saved as .CRT, .P12, or .PFX files). 0 files can be installed at the user level or the system level, which determines whether all Android apps trust the certificate by default. However, to install a 0 file at the system level, you must possess a rooted Android device and manually move the 0 file to your device's system/​etc/​security/​cacerts directory. In most cases, you can simply install 0 files at the user level, and the apps that require that certificate will function correctly.

To install a 0 file at the user level on Android:

1. Place the 0 file on your Android device's SD card.
2. Open your device's Settings app and select Security → Encryption & Credentials.
3. Select Install from storage.
4. Select CA Certificate.
5. Click through the warning message Android displays.
6. Navigate to and select your 0 file.

Android's certificate manager will open, allowing you to install your certificate.

After you install a 0 file, Android will automatically delete the file from its current location and place it in the data/​misc/​user/​0/​cacerts-added directory.