How to Choose a microSD Card
Here are three things to consider before buying a microSD card.
1. Capacity For smartphone photo storage or Nintendo Switch game downloads, 128GB is a solid starting point. If you frequently shoot 4K video or carry a large music library, go with 256GB or more. Larger cards generally have a lower cost per gigabyte, so you get more value by sizing up.
2. Read and Write Speed Pay attention to both read and write speeds. Read speed affects how fast you can copy files or load apps. Write speed determines whether you can shoot burst photos or record high-quality video without dropped frames. For general use, a read speed of 100MB/s or above provides a smooth experience.
3. Speed Class Ratings UHS Speed Class “U1” guarantees a minimum 10MB/s write speed, while “U3” guarantees 30MB/s. For 4K video recording, U3 (or V30 Video Speed Class) is the minimum you should consider. For Full HD video and everyday use, U1 is perfectly fine.
microSD Card Comparison Table
| Product | Capacity | Read Speed | Write Speed | Speed Class | Price |
|---|---|---|---|---|---|
| Samsung EVO Plus 128GB | 128GB | 160MB/s | 120MB/s | U3 / V30 | ~$12 |
| KIOXIA EXCERIA 128GB | 128GB | 100MB/s | – | U1 | ~$7 |
| SanDisk Extreme 128GB | 128GB | 190MB/s | 90MB/s | U3 / V30 | ~$15 |
| SanDisk Extreme 256GB | 256GB | 190MB/s | 130MB/s | U3 / V30 | ~$24 |
| BUFFALO 128GB | 128GB | 100MB/s | – | U1 | ~$8 |
| Samsung EVO Plus 256GB | 256GB | 160MB/s | 120MB/s | U3 / V30 | ~$19 |
Product Details
1. Samsung EVO Plus 128GB – Best Overall Pick
Samsung’s EVO Plus is the most well-rounded microSD card you can buy. With 160MB/s read and 120MB/s write speeds at a very reasonable price, it handles everything from 4K video recording (U3/V30) to everyday phone storage with ease. It is also built tough – waterproof, temperature-proof, magnetic-proof, and X-ray-proof. Whether you use it in a smartphone, camera, or Nintendo Switch, this is the card to get.
2. KIOXIA EXCERIA 128GB – Best Budget Card
At around $7 for 128GB, this is the most affordable card in the lineup. KIOXIA (formerly Toshiba Memory) brings solid manufacturing quality to a budget price point. The 100MB/s read speed is perfectly fine for Nintendo Switch game storage, phone backups, and general file transfers. If you want to spend as little as possible without sacrificing reliability, start here.
3. SanDisk Extreme 128GB – Fastest in Its Class
With a 190MB/s read speed, this is the fastest 128GB card in our comparison. It handles 4K video from action cameras and drones without breaking a sweat, and its A2 app performance rating makes it a strong choice as expanded storage for Android phones. SanDisk’s long reputation for reliability makes it a favorite among photographers and creators.
4. SanDisk Extreme 256GB – More Space, Same Speed
This is the 256GB sibling of the Extreme 128GB, bringing the same blazing 190MB/s read speed with even faster 130MB/s write performance. The extra capacity is perfect for extended travel shoots, content creation, or anyone who does not want to worry about running out of space. If 128GB feels tight for your workflow, this is the natural upgrade.
5. BUFFALO 128GB – Reliable Japanese Brand
BUFFALO is one of Japan’s most well-known computer accessory brands, and this 128GB card offers solid everyday performance at a fair price. The 100MB/s read speed covers typical use cases comfortably. A free data recovery software download is included, providing an extra safety net in case of accidental deletion.
6. Samsung EVO Plus 256GB – Best High-Capacity Value
This is the 256GB version of our top pick, carrying forward the same 160MB/s read, 120MB/s write, and U3/V30 specs in a larger capacity. It is ideal for anyone who knows 128GB will not be enough – think heavy photo shooters, 4K video users, or people who want to future-proof their storage. The price premium over 128GB is modest, making it a smart investment.
Summary
For the best all-around microSD card, go with the Samsung EVO Plus 128GB. It delivers fast speeds, 4K-ready performance, and excellent durability at a price that is hard to argue with. If budget is everything, the KIOXIA EXCERIA 128GB gets the job done at rock-bottom pricing. Need the fastest speeds? The SanDisk Extreme 128GB leads the pack at 190MB/s.