Switch 2 microSD Express vs microSD: Storage & Migration
The Nintendo Switch 2 uses microSD Express cards for expanded storage, while standard microSD cards from the original Switch are not compatible. To move games, you must use a supported microSD Express card or transfer data over Wi-Fi or a wired connection; there is no direct card-to-card migration.
Background: Why the Switch 2 Changed Storage
The original Nintendo Switch launched in 2017 with a microSD slot that supported UHS-I cards, which top out at around 100 MB/s read speeds. The Switch 2, released in 2025, is designed for larger, faster games, and its cartridge and download sizes have grown accordingly. To keep load times acceptable, Nintendo adopted the microSD Express standard, which uses a PCIe and NVMe interface to deliver speeds roughly 5–7 times faster than UHS-I. This is why the physical slot in the Switch 2 is keyed differently: a standard microSD card physically will not fit, and even if it did, the console would not read it.
How microSD Express Works
microSD Express cards combine the familiar microSD form factor with a second row of pins that carry PCIe Gen 3 x1 and NVMe signals. The card has two “gold� contact areas: the traditional SD pins for backward compatibility and a new set for the high-speed interface. When inserted into a Switch 2, the console uses the PCIe/NVMe path for all game data, which yields sequential read speeds of around 800 MB/s to 1,000 MB/s in real-world tests. Write speeds are slower, typically 300–600 MB/s, but that is still far above what the original Switch could achieve.
For comparison, a standard microSD (UHS-I) card reads at 80–100 MB/s. The difference is most noticeable when loading large open-world games or when transferring many gigabytes of data. The Switch 2 also has 256 GB of internal storage, which is eight times the original Switch’s 32 GB, but modern games can exceed 50 GB each, so expansion is still necessary for most users.
Compatibility: What Fits and What Doesn’t
- microSD Express (SD 8.0): Supported. These cards have the second pin row and are the only external cards the Switch 2 reads.
- microSD (UHS-I, UHS-II, UHS-III): Not supported. They lack the PCIe/NVMe pins and are physically incompatible with the Switch 2’s slot.
- microSDXC and microSDHC: The Switch 2 supports microSDXC (64 GB to 2 TB) and microSDHC (up to 32 GB) cards, but only if they are Express type. No standard microSD card works.
Nintendo explicitly states that standard microSD cards cannot be used with Switch 2, even via an adapter. The slot is designed to prevent insertion, so do not force a card in. If you have a collection of microSD cards from your original Switch, they are not usable in the Switch 2 at all.
How to Choose the Right Card
When buying a microSD Express card for Switch 2, look for the “microSD Express� label and the SD 8.0 specification. The card should have a speed class rating of at least “Class 3� (U3) for write speeds, but the key is that it must be Express. As of 2025, cards are available in 128 GB, 256 GB, 512 GB, and 1 TB capacities, with 2 TB expected later. Prices are higher than standard microSD cards—roughly 2–3 times per GB—so it is worth buying the largest you can afford to avoid frequent swapping.
There is no benefit to buying a card faster than the Switch 2’s interface supports. The console uses PCIe Gen 3 x1, which caps at around 1 GB/s. Cards rated for 1,500 MB/s will still run at the console’s limit. Also, ignore the “A2� app performance rating; it is irrelevant to the Switch 2 because that rating applies to random I/O for phones and tablets, not game loading.
Storage Migration: How to Move Games
You cannot remove a microSD card from an original Switch and put it into a Switch 2. There is also no way to copy games from one card to another by plugging both into a PC, because the Switch encrypts game data to the console. The only supported methods are:
- System Transfer (Wireless): From the Switch 2’s home menu, go to Settings > System > System Transfer. Both consoles must be on the same Wi-Fi network and plugged into power. The transfer moves save data, user profiles, and games (but not the game cartridges). The process can take a while for large libraries; a 100 GB library might take 30–60 minutes.
- Wired Transfer: You can connect the two consoles with a USB-C cable (the same cable that charges the Switch 2). This is faster than Wi-Fi, but still not as fast as a direct card read. The option appears in the same System Transfer menu when a cable is detected.
- Re-download: If you have a Nintendo Switch Online subscription or you have purchased digital games, you can simply re-download them on the Switch 2 from the eShop. This is often the quickest method for a small library, but it requires an internet connection and does not move save data automatically.
Save data is stored on the console’s internal memory, not on the microSD card. So when you move games, the save files stay on the source console. To move saves, you must use the “Transfer Save Data� feature in System Settings, which works over Wi-Fi or cable. Cloud saves are available for most games with a Switch Online subscription, but not for all (e.g., Splatoon 3 and Animal Crossing: New Horizons do not support cloud saves).
Common Problems and Misconceptions
“My old microSD card doesn’t fit.� That is expected. Do not force it. The Switch 2’s slot is physically different.
“I put a standard microSD in an adapter and it worked.� No, it did not. Any adapter that fits a standard microSD into the Switch 2 slot would be a third-party product that bypasses the physical key, but the console will not recognize the card because it lacks the PCIe pins. You would see an error message.
“Can I use a microSD Express card in a PC?� Yes, if your PC has a microSD Express reader. Many modern laptops and tablets have them. The card works like a small NVMe SSD.
“Do I need to format the card?� The Switch 2 will format a new microSD Express card automatically when you insert it. Do not format it on a PC first, as that can cause compatibility issues.
“Is the Switch 2’s internal storage faster than microSD Express?� Yes, the internal NVMe storage is faster (around 2 GB/s), but the difference is negligible in most games. Load times are typically 10–20% longer from a microSD Express card, which is barely noticeable.
Cost and Value Considerations
As of 2025, a 256 GB microSD Express card costs roughly $50–$70, while a 512 GB card is $90–$130. A 1 TB card can exceed $200. Compare that to standard microSD cards, which are about $20 for 256 GB. The premium is significant, but it is the only way to expand storage. If you buy a Switch 2 with 256 GB internal storage, a 512 GB card gives you 768 GB total, which is enough for 10–15 large games. If you are a physical game collector, you may not need a card at all, since game cartridges do not require installation (though some games still require a download for updates or additional content).
One tip: do not buy a cheap “microSD Express� card from an unknown brand. Counterfeit cards are common and often have fake capacity or speed ratings. Stick to well-known brands and buy from reputable retailers.
Frequently Asked Questions
Can I use a regular microSD card from my old Switch in the Switch 2?
No. Regular microSD cards are physically incompatible and will not fit in the Switch 2’s slot. You must use a microSD Express card.
How do I move my games from the original Switch to the Switch 2?
Use the System Transfer feature in Settings, either over Wi-Fi or with a USB-C cable. You can also re-download games from the eShop, but save data must be transferred separately.
Is microSD Express worth the extra cost?
If you need more storage, yes. The speed difference is noticeable for large games, and there is no alternative. If you can fit your library in 256 GB internal storage, you can skip it.
Will Nintendo release a firmware update to support standard microSD?
No. The hardware slot is different, so it is impossible. Standard microSD cards will never work in the Switch 2.
Can I use a microSD Express card in a PC to transfer files?
You can read the card on a PC with a compatible reader, but you cannot copy game files from a Switch to a PC and back, because the data is encrypted to the console.
What is the maximum capacity microSD Express card supported?
Nintendo states that the Switch 2 supports microSDXC cards up to 2 TB. As of 2025, 1 TB is the largest widely available, but 2 TB cards are expected.
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