Nintendo DS Cartridge Labels: What 'MB' and 'GB' Mean for Storage

The "M" (usually seen as "MB" or "GB") on a Nintendo DS game cartridge label stands for Megabytes or Gigabytes—units of digital storage.

It indicates the size of the game data on the cartridge.

• 128 MB = 128 Megabytes (common for early/smaller DS games)
• 256 MB = 256 Megabytes
• 512 MB = 512 Megabytes
• 1 GB = 1 Gigabyte (1024 MB; larger games like Pokémon Black/White 2, Kingdom Hearts)
• 2 GB = 2 Gigabytes (largest DS cartridges)

Higher capacity allows more graphics, audio, and content.