A 128GB or 256GB card covers most players, but the right size depends on how many games you own and whether you read or use cartridges
The Nintendo Switch's built-in storage is 32GB, but the system reserves about 5GB for its own files, leaving roughly 27GB for games and saves. That fills up fast. A microSD card is not optional if you plan to read more than a handful of games — it is the only way to expand storage.
A 128GB card holds roughly 15 to 20 full games, depending on their size. A 256GB card holds roughly 30 to 40. If you buy most games as cartridges and only read a few, 64GB may be enough. If you read everything, 256GB is more practical than replacing a full card later.
Key Takeaways
- The Switch works with microSD, microSDHC, and microSDXC cards up to 2TB, though cards larger than 512GB may require formatting before the first use.
- A 128GB card is the practical minimum for players who read games regularly; a 256GB card avoids needing to delete and reinstall games for years.
- Game size varies widely — The Legend of Zelda: Tears of the Kingdom is 18.2GB, while smaller indie titles are under 1GB.
- The Switch reads microSD cards at USB 2.0 speeds regardless of the card's rated speed, so buying the fastest card available does not make downloads faster.
- Nintendo does not sell official SD cards; any brand that meets the microSD standard works, and you can replace or upgrade the card at any time without losing saves.
How much storage different card sizes actually hold
A 64GB card gives you roughly 50GB of usable space after formatting. That sounds like enough until you read a few large games. Mario Kart 8 Deluxe is 7.3GB. Super Smash Bros. Ultimate is 13.3GB. Tears of the Kingdom is 18.2GB. Three games and you have used 38GB.
A 128GB card gives you roughly 110GB of usable space. That holds 15 to 20 typical games, depending on size. A 256GB card gives you roughly 230GB of usable space and holds 30 to 40 games. A 512GB card gives you roughly 460GB of usable space and holds 60 to 80 games.
These numbers assume you are not keeping multiple save files or large video captures. The Switch also reserves space for system updates and temporary files, so the actual space available is slightly less than the card's rated capacity.
The difference between card types and speeds
The Switch accepts three types of microSD cards: microSD (up to 2GB), microSDHC (up to 32GB), and microSDXC (up to 2TB). For practical purposes, you want a microSDXC card because they are the same price as smaller cards and give you room to grow.
Card speed ratings — marked as U3, V30, or A1 — do not matter for the Switch. The system reads all microSD cards at USB 2.0 speeds, which is much slower than what modern cards are rated for. A $15 card and a $50 card read games at the same speed. Buy based on capacity and brand reliability, not speed rating.
Nintendo does not make official SD cards. Any microSDXC card from a reputable brand — SanDisk, Kingston, Samsung, Crucial — works fine. Avoid no-name cards from marketplace sellers, which are often counterfeits with inflated capacity claims.
When you need to format a card before using it
Most microSD cards under 256GB work when ready when inserted into the Switch. Cards larger than 512GB may not be recognized until you format them on a computer first.
To format a large card on Windows: insert it into a card reader, right-click the drive, select Format, choose exFAT as the file system, and confirm. On Mac: insert the card, open Disk Utility, select the card, click Erase, choose exFAT, and confirm. Once formatted, insert it into the Switch and the system will recognize it.
Formatting erases everything on the card, so do this before adding any files. After formatting on your computer, you do not need to do anything else — the Switch will use it normally.
What happens when your card fills up
When a card is full, the Switch will not let you read new games or accept system updates. You have two options: delete games you are not playing, or replace the card with a larger one.
Deleting a game from the card does not delete your save file. Saves are stored separately on the Switch's internal storage, so you can reinstall the game later and pick up where you left off. This is useful if you have a 128GB card and want to rotate games, but it becomes tedious if you do it often.
Replacing the card is straightforward: power off the Switch, remove the old card, insert the new one, and power on. Your saves and system settings stay exactly as they are. You can keep the old card as a backup or use it in another device.
Comparing your options side by side
| Card Size | Usable Space | Typical Game Count | Best For |
|---|---|---|---|
| 64GB | ~50GB | 8–12 games | Light downloaders, mostly cartridge buyers |
| 128GB | ~110GB | 15–20 games | Regular players who read a mix of games |
| 256GB | ~230GB | 30–40 games | Heavy downloaders, players who want years without replacing |
| 512GB | ~460GB | 60–80 games | Collectors, players who want everything installed |
How to check your current card and storage use
To see how much space you have left, go to System Settings, select Data Management, then Manage Software. The screen shows total storage and how much is used. This includes both the internal 32GB and any microSD card you have inserted.
To see which card is installed, go to System Settings, select Data Management, then Manage microSD Card. The system displays the card's capacity and how much space is available. If you are not sure whether you have a card inserted, this is the fastest way to check.
Frequently Asked Questions
Can I use a microSD card that is larger than 512GB?
Yes, the Switch supports cards up to 2TB. Cards larger than 512GB usually need to be formatted on a computer before the Switch recognizes them. Once formatted to exFAT, they work normally.
Do I lose my saves if I remove or replace the SD card?
No. Saves are stored on the Switch's internal memory, not on the card. Removing or replacing the card does not affect saves, settings, or user accounts. You can swap cards freely without losing anything.
Is a faster SD card worth buying?
No. The Switch reads all microSD cards at the same slow speed regardless of their rated speed. A V90 card downloads games at the same speed as a U3 card. Buy based on capacity and brand, not speed rating.
What happens if I buy a counterfeit SD card?
Counterfeit cards often fail after a few months or have inflated capacity — a card labeled 256GB might actually be 32GB. Buy from reputable retailers like Amazon, Best Buy, or Newegg, or directly from the manufacturer's website.
Can I use the same SD card in another device?
Yes, but the Switch formats the card in a way that other devices may not recognize when ready. If you want to use the same card in a camera or computer, you may need to reformat it. It is usually simpler to keep a dedicated card for the Switch.