128 GB or 256 GB MicroSD Card (Formatted to FAT32).
Several factors make the 3DS library much larger than its predecessors (DS or GBA).
A "complete set" often includes European, American, and Japanese versions. While the games are similar, the inclusion of region-specific eShop titles adds up.
The 3DS was the last great dedicated handheld. Its library deserves preservation. Just make sure you have enough hard drive space—and patience—for the task. Happy hoarding. 3ds Complete Rom Set Size
Analysis of the Nintendo 3DS Complete ROM Set and Storage Requirements
~3.6 GB (One of the largest games on the system) Pokemon Sun / Moon: ~3.2 GB Super Smash Bros. for Nintendo 3DS: ~2.1 GB The Legend of Zelda: Ocarina of Time 3D: ~512 MB Animal Crossing: New Leaf: ~1 GB Pushmo (eShop Exclusive): ~150 MB Storage Recommendations for Collectors
If you do not speak or read Japanese, excluding the JPN-exclusive library immediately cuts your storage requirements by more than half. Hardware Recommendations for Collectors 128 GB or 256 GB MicroSD Card (Formatted to FAT32)
| Scope | Typical size (approx.) | |---|---:| | Single region retail set | 1.0–1.8 TB | | Multi-region retail (USA+EUR+JPN) | 2.0–4.0 TB | | Multi-region + DLC/updates | 3–6+ TB | | Compressed/deduplicated single-region | 0.7–1.5 TB |
Late-cycle games and "New 3DS" exclusives often used the maximum 4GB cartridges. For example:
Includes every retail card game and digital release across North America (USA), Europe (EUR), and Japan (JPN). While the games are similar, the inclusion of
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Highest. A 500 MB game might take up 1 GB of space due to padding. 2. .CIA (CTR Importable Archive)
The format of the ROM itself dictates its size and intended use: