The most common Switch 2 buying mistake is not getting too little capacity — it is buying an ordinary microSD card. It slots in, the console sees it, and then games will not install.
The reason is simple: Nintendo states that the Nintendo Switch 2 is only compatible with microSD Express cards.
What can a standard microSD still do on a Switch 2?
Essentially one thing: import screenshots and videos from your old console. Nintendo's support pages say that screenshots and videos saved on a microSD card from a Nintendo Switch can be imported to the Switch 2's system memory, and that microSD cards cannot be used with the Switch 2 for any other purpose. No game installs, no storage expansion.
One more thing people expect to move and cannot: game save data lives in system memory and cannot be copied or saved to a microSD Express card. microSD Express can store software, screenshots and videos; game saves stay in system memory.
How do you tell an Express card apart?
Read the packaging and the card face — microSD Express is a separate SD Association standard, and genuine cards say "Express" explicitly. Three practical tells:
- Different contacts. An Express card has an extra row of pins on the back for its PCIe lane, which an ordinary UHS-I card does not have.
- A different speed class entirely. UHS-I tops out at 104MB/s; SD Express runs on PCIe, with a specified ceiling of 985MB/s on a Gen 3 single lane.
- Capacity ceiling. Nintendo says any card meeting the microSD Express standard, up to 2TB, can be used.
If a card lists only V30, A2 and UHS-I and never mentions Express, it is not one — however fast it claims to be.
How much capacity do you need?
It is not only digital purchases that consume space on Switch 2. Game-Key Cards do as well. Nintendo describes a game-key card as your "key" to downloading the full game: the game data is not on the card, it downloads to the console's system memory or a microSD Express card, and the free space required is printed on the packaging. Once downloaded, the card must be inserted to play. Offline play still depends on the game's own requirements; online modes, updates or other services may need an internet connection.
Ordinary physical game cards and Game-Key Cards are different. Game-Key Cards require the full software download; ordinary cards may still need updates, DLC or other downloads. Add up actual installed sizes, captures and space for future updates before choosing capacity:
- 128GB — a small installed library, if the actual game sizes fit
- 256GB — more headroom, but check the combined size of downloads and updates
- 512GB — a larger library; future downloads can still fill it
Our Kodak microSD Express card (SD Express 7.1, PCIe Gen 3 x1) comes in 128GB, 256GB and 512GB, Hong Kong licensed stock.
Can an Express card go in an original Switch?
It can, but there is no benefit. Nintendo states that on a Nintendo Switch console, the read and write speed of a microSD Express card is equivalent to that of a standard microSD card — Express money, UHS-I speed.
Does the speed difference actually matter in play?
Express uses PCIe/NVMe and has a higher theoretical interface ceiling than UHS-I. That comparison alone does not establish load times or gameplay smoothness for a particular card and game. For Switch 2 software expansion, follow Nintendo's confirmed microSD Express compatibility requirement rather than treating the interface ceiling as a measured performance result.
As a gift
If you are giving a Switch 2 or a game, an Express card can help if the recipient needs more software storage; check their free system space and planned downloads first. More pairings in our Christmas gift guide; for what V30, A2 and UHS-II mean elsewhere, see our memory card guide.
FAQ
How do I set up a new card?
Follow Nintendo's card-insertion and setup instructions, including switching off the console before inserting or removing the card. Back up any files you need before formatting, which erases the card. Use the console's Data Management options for supported software transfers.
Can I use an external SSD or USB drive instead?
The expansion Nintendo documents is the microSD Express card, up to 2TB. Buy to that standard.
What happens when the card fills up?
Save data remains in system memory when software is removed from the card. Redownloading needs the correct account or Game-Key Card entitlement, an available download and internet access. Check current installed sizes and how often you are willing to manage software rather than assuming any capacity ends storage decisions permanently.
Ordering and warranty
Kodak cards are Hong Kong licensed stock with brand warranty. Confirm current stock, delivery timing and collection arrangements before ordering; our Kwun Tong location is for stock and collection. The full range is in memory cards & SSDs — questions to WhatsApp +852 9847 9793.
