A complete Nintendo 3DS ROM set typically requires approximately 1.7 TB to 1.8 TB of storage space.
The jump in storage reflects the evolution of handheld graphics: Game Boy (GB): ~800 MB for the entire library. 3ds Complete Rom Set Size
| Tier | Definition | Approximate Size | Number of Files | | :--- | :--- | :--- | :--- | | Core Set (USA Only) | Every title released in North America. No duplicates, no demos. | 1.2 TB | ~1,400 ROMs | | Full Regional Set | USA, JPN, EUR, and KOR. No duplicates (one copy per title ID). | 2.4 TB | ~4,500 ROMs | | The "Hoarding" Set | All regions + Demos + Updates + DLC + Virtual Console + eShop exclusives. | 4.5+ TB | ~8,000+ files | A complete Nintendo 3DS ROM set typically requires
Official Support: The system officially supports SDHC cards up to 32 GB. Full USA Set (No duplicates): ~900 GB – 1
If you plan to store these on a 3DS system, there are hardware-specific limits to keep in mind: Citra: How to Set it Up and Other Recommendations