Silicon Power 256GB Micro SD Card U3 SDXC Up to 100MB/s High Speed Memory Card with Adapter for Nintendo-Switch, Cams and Drones
Quick take
This Silicon Power 256GB microSDXC U3/V30 card is designed for high-capacity storage and video-friendly performance across devices like Nintendo Switch (after a system update), smartphones, tablets, and action-camera style use. Buyers generally like its value and the fact that it works properly in their Switch, but there is some evidence that real-world write speeds can fall well below the “up to 100MB/s” marketing figure.
Pros and cons
Pros
- UHS Speed Class 3 (U3) and Video Speed Class 30 (V30), which are intended for smoother video recording workloads.
- High compatibility positioning for common device types (smartphones, tablets, action cameras, drones, and Nintendo Switch with an update).
- 256GB capacity is convenient for game libraries, media files, and expanding storage without frequent swaps.
- Backed by a 5-year limited manufacturer warranty.
Cons
- Some buyers report write speeds not approaching the advertised “up to 100MB/s,” with performance closer to mid-range speeds.
- Switch compatibility requires a system update, and that step matters before expecting full behavior.
- Buyer-review evidence is mixed, including limited accounts of device-recognition problems, so compatibility can vary by host device and formatting habits.
What buyers think
Buyer-review evidence is broadly positive on practical day-to-day use, especially for Nintendo Switch storage expansion. Several shoppers describe the card as easy for the Switch to read and as a good value compared with other options in similar capacity. That said, at least some review feedback suggests write speeds may not reach the “up to 100MB/s” headline, implying buyers should manage expectations if they are specifically chasing faster transfers. Overall, the review themes center on capacity value and device acceptance, with speed performance that can be less impressive than the top-end marketing number.
What this microSDXC card is for
The Silicon Power 256GB microSDXC U3/V30 card targets buyers who want one larger memory option for multiple device categories: gaming storage (Nintendo Switch after update), media on phones and tablets, and video recording tasks that benefit from a video speed rating. Its U3 and V30 classes are meant to support sustained read/write expectations better than basic cards when filming or capturing footage.
Speed and performance, in plain terms
On paper, this card is rated for up to 100MB/s read speed, and it also carries a V30 video rating. In real-world usage, some buyers report write speeds that come in noticeably below the top-end figure (with numbers closer to roughly 60MB/s in one cited experience). If your priority is quick file transfers, it helps to understand that “up to” depends on the device, the card reader (if you use one), and the type of workload.
Compatibility notes (especially for Nintendo Switch)
This card is positioned as compatible with the Nintendo Switch, but a system update is required to use microSDXC cards on the console. If you skip the update, you may not get the expected results. For cameras, drones, and mobile devices, compatibility usually depends on the device’s microSDXC support, the formatting the device expects, and whether the firmware is up to date.
Pros and cons recap
When it’s a strong pick
- You want 256GB of extra storage without jumping to higher-priced, performance-focused cards.
- You need a microSDXC card that’s intended for video recording workflows (V30) and everyday app/media use (U3).
- You are expanding a Nintendo Switch library and can complete the required system update.
When you should think twice
- You need consistently higher transfer speeds and are sensitive to the gap between “up to” marketing numbers and what you measure.
- Your device is picky about storage initialization, formatting, or microSDXC support, and you want the lowest-variance experience.
Price and availability
Availability is listed as in stock for U.S. buyers, and pricing can vary by seller. If you want the most current cost for this specific SKU, check the live listing via the button below.
Simple microSD buying guide (so you pick the right level)
Match your workload to the speed rating
- Video recording: Look for Video Speed Class (V30 or higher) and confirm your device recommends that class.
- Apps and general performance: UHS Speed Class 3 (U3) is a good baseline for smoother sustained operations.
- Transfer speed expectations: “Up to” read/write rates require a compatible device or card reader and may not reflect your exact scenario.
Capacity matters, but plan storage usage
Because formatting and system overhead reduce usable space, a “256GB” card will not provide the full marketing number as available storage. That’s normal across flash storage, so it helps to think in terms of usable gigabytes for games, photos, and video rather than the nominal capacity.
FAQ
Is this microSD card good for Nintendo Switch?
It’s designed to work with Nintendo Switch using microSDXC cards, but the console requires a system update first. After updating, it should be recognized for expanded storage.
Will I get the full “up to 100MB/s” speeds?
Probably not in every setup. Some buyers report write speeds below the marketing number, which can happen due to the device, the way files are transferred, and whether you’re using a compatible reader.
What do U3 and V30 mean?
U3 indicates UHS Speed Class 3 intended for sustained performance, and V30 indicates Video Speed Class 30, which is meant to support video recording at a more reliable baseline than entry-level cards.
Is this card suitable for action cameras or drones?
It’s positioned for those categories, and the U3/V30 ratings are intended to help with video workloads. Still, confirm your specific device supports microSDXC cards and consider formatting expectations.
Does it come with an adapter?
The product title indicates an adapter is included, which can help if you use a full-size SD card reader that accepts SD adapters.
How long is the warranty?
It includes a 5-year limited manufacturer warranty.
Specifications
| Product Title | Silicon Power 256GB Micro SD Card U3 SDXC Up to 100MB/s High Speed Memory Card with Adapter for Nintendo-Switch, Cams and Drones |
|---|---|
| Category | Electronics > Computers & Accessories > Computer Accessories & Peripherals > Memory Cards > Micro SD Cards |
| Brand | SP Silicon Power |
| Manufacturer | SP Silicon Power |
| Model Name | NOT compatible with Switch2 |
| Model Number | SU256GBSTXDU3V20AC |
| Item Weight | 0.01 Kilograms |
| Color | 256GB |
| Flash Memory Type | Micro SDXC |
| Memory Storage Capacity | 256 GB |
| Compatible Devices | Dash Cam, Drone, Smartphone, Sport Camera |
| Additional Features | Temperature Proof, Water Proof, X Ray Proof |
| Read Speed | 100 Megabytes Per Second |
| Media Speed | 20 MB per second |
| Hardware Connectivity | microSDXC |
| Secure Digital Association Speed Class | Class 10 |
| Flash Memory Video Speed Class | 30 |
| Item Dimensions D x W x H | 0.03"D x 0.43"W x 0.59"H |
| Warranty Type | Limited |
| UPC | 886576049632 886576045672 |
| Global Trade Identification Number | 00886576045672 |
| Mfr Part Number | SU256GBSTXDU3V20AC |
| Unit Count | 1.0 Count |
| Warranty Description | 1 |
Available variants
Capacity
- 256 GB
- 512 GB
Style
- microSD UHS-I
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