SanDisk Extreme PRO 256 GB Class 3/UHS-I
- MicroSD Card
- Better rated than 89%
- More reviewed than 79%
A dependable high-capacity microSD card with the write speed video recording actually needs, from a brand with a long track record in memory cards.
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How it ranks among the 19 microsd cards we track
4.8★ across 24,400 Amazon ratings, Bayesian-smoothed toward the category average.
24,400 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
3,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 19 microsd cards we track - how the scorecard works · full microsd cards data report. Confidence: limited - incomplete product information.Updated 8 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The SanDisk Extreme PRO 256GB microSDXC is a Class 3 UHS-I (U3) V30 card rated for a roughly 60 MB/s write speed, built to keep up with high-definition video recording on a phone, tablet, action camera or drone. 256GB gives enough room for extended video sessions plus a large photo library.
The U3 and V30 ratings are the part that actually determines whether a camera can record 4K without dropped frames, not just the storage size, so this card sits above basic microSD cards meant for simple file storage. As a straight memory upgrade it is a low-risk purchase category, useful for anyone whose device is refusing 4K recording or running out of space mid-shoot.
- 256GB microSDXC capacity
- Class 3, UHS-I, V30 speed rating
- About 60 MB/s write speed
- Suited to HD and 4K video recording
Who it's for
A fit for anyone recording HD or 4K video on a phone, action camera or drone who needs both the write speed and the capacity to avoid interruptions. Overkill for someone who only stores music or documents and never records video.
Strengths and trade-offs
Drawn from this product's published specifications.
- V30 rating supports sustained high-definition video recording
- 256GB holds a large amount of video and photos
- UHS-I U3 speed class is widely supported by cameras and phones
- Listing gives no adapter or read-speed detail beyond write speed
- 256GB capacity costs more than smaller cards for buyers who do not need the space
Performance notes
The V30 rating guarantees a minimum sustained write speed of 30 MB/s, which is what keeps 4K video recording from stuttering or dropping frames, while the listing cites a write speed around 60 MB/s in practice. UHS-I and Class 3 (U3) are the interface and speed class standards that make the card compatible with cameras and phones built for high-bitrate recording.
Specifications
| Brand | SanDisk |
|---|
Other SanDisk microsd cards
How it compares
This product against the closest alternatives we track in microsd cards.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| SanDisk Extreme PRO 256 GB Class 3/UHS-IThis product | 4.8 / 5 | 24,400 | 2.7 / 5 |
| Made for Amazon SanDisk 128GB microSD Memory Card for Fire Tablets and Fire -TVSandisk | 4.6 / 5 | 95,400 | 4.8 / 5 |
| Patriot 64GB Micro SD V30 A1 Memory CardPatriot Memory | 4.5 / 5 | 12,900 | 4.7 / 5 |
| Samsung PRO Endurance 128GB microSDXC Memory Card with AdapterSamsung | 4.7 / 5 | 9,600 | 4.7 / 5 |
| Amazon Basics microSDXC Memory Card with Full Size AdapterAmazon Basics | 4.7 / 5 | 97,500 | 4.6 / 5 |
Similar microsd cards from other brands
Questions about the SanDisk microsd cards
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Is the SanDisk Extreme PRO 256GB fast enough for 4K video?
Yes, its V30 rating guarantees a sustained write speed built for 4K recording, and the listing cites around 60 MB/s in practice.
What does U3 mean on this SanDisk card?
U3 is the UHS speed class, indicating a minimum sustained write speed suited to high-definition and 4K video recording.
How much storage does this SanDisk microSDXC card offer?
256GB, enough for extended video recording sessions along with a large photo library.