microSD Card Buyer’s Guide: Choose the Right Card for Your Devices

Is the dreaded "Storage Almost Full" notification popping up on your smartphone at the worst possible moment? Are your 4K video recordings stuttering or stopping altogether? At first glance, choosing a microSD card seems straightforward. But between the obscure standards, speed classes, and dizzying capacities, it's easy to get lost.

Don't panic! This guide is here to demystify the jargon and help you find THE perfect memory card for your smartphone, gaming console, camera, or drone.

By the Joybuy team, your high-tech product experts.

The Essential Criteria for Choosing Your microSD Card

Before diving into our top picks, let's review the three key criteria that will guide your purchase: capacity, speed, and compatibility.

1. Capacity: How Many Gigabytes (GB) Do You Really Need?

This is often the first number people look at, and for good reason. Here are a few benchmarks to help you decide:

• 32GB to 64GB: Sufficient for light use, such as expanding the storage of an entry-level smartphone for a few apps and photos.
• 128GB to 256GB: The sweet spot for most users. A 256GB microSD card can store thousands of photos, hours of Full HD or 4K video, and a sizable game library on a portable console.
• 512GB and up: Recommended for content creators who regularly shoot in 4K, photographers using the RAW format, or avid gamers who want to install numerous large games on their Nintendo Switch microSD card.

2. Speed: Deciphering the U, V, and A Classes

Speed ratings are crucial for performance. They guarantee a minimum write speed, which is essential for tasks like smooth video recording.

• UHS Speed Class (U1, U3): This is the most common standard. U1 (10 MB/s minimum) is sufficient for Full HD video. U3 (30 MB/s minimum) is essential for shooting in 4K without any issues.
• Video Speed Class (V30, V60, V90): A classification designed for very high-definition video. V30 corresponds to U3 and guarantees 30 MB/s. The V60 (60 MB/s) and V90 (90 MB/s) classes are reserved for professional cameras and 8K recording.
• Application Performance Class (A1, A2): A critical factor if the card is intended for a smartphone. An A2 card offers much higher random read and write speeds than an A1 card. The result: apps stored on the card launch much faster.

3. Compatibility: SDHC, SDXC, and the New SD Express Standard

An essential check before you buy: verify your device's compatibility.

• SDHC (Secure Digital High Capacity): Cards from 4GB to 32GB.
• SDXC (Secure Digital eXtended Capacity): Cards from 64GB to 2TB. Most modern devices are SDXC compatible.
• SD Express: The new standard that leverages a PCIe interface (similar to SSDs) to achieve stratospheric speeds. An SD Express card is backward compatible with older devices (where it will operate at UHS-I speeds), but will only unleash its full power with a compatible device.

Our Recommended microSD Card Picks

Here are three models that caught our eye, each tailored to a specific user profile—from everyday storage to professional demands.

Samsung PRO Plus MicroSDXC 128GB (2023)

Why it stands out: The Samsung PRO Plus card offers the ideal balance of speed, reliability, and capacity. With advertised speeds of up to 180 MB/s read and 130 MB/s write, it's perfectly suited for intensive use.

Pros:

• High speeds (180 MB/s read, 130 MB/s write) for lightning-fast file transfers.
• V30 and A2 certified, making it a versatile choice that's equally at home with 4K video and smartphone apps.
• Includes an SD adapter for broad compatibility with cameras and computers.
• It's built to withstand almost anything: water, extreme temperatures, X-rays, magnetic fields, drops, and wear, according to Samsung.

Best for: Owners of recent Android smartphones, drones, or action cams looking for a reliable and fast card to shoot in 4K and launch their apps without any lag.

See the Samsung PRO Plus 128GB Card

SanDisk Ultra microSDXC 512GB

Why it stands out: The SanDisk Ultra is the smart choice for those who prioritise storage capacity above all else. With 512GB, it allows you to store an impressive volume of data, perfect for long holidays or for archiving your media files.

Pros:

• Massive 512GB capacity so you never run out of space again.
• Read transfer speeds of up to 150 MB/s to quickly move your files to a computer.
• A1 performance class for smooth use of apps installed on it.
• Includes an SD adapter, ensuring compatibility with a wide range of devices.

Best for: Those who primarily want to boost the storage of their Android smartphone or tablet to hold a mountain of photos, Full HD videos, music, and other files, without necessarily aiming for record-breaking write speeds.

See the SanDisk Ultra 512GB Card

Samsung P9 Express 256GB MicroSDXC

Why it stands out: This model embodies the future of memory cards. By leveraging the SD Express standard, it shatters records with theoretical read speeds of up to 800 MB/s, approaching SSD-level performance. It's a future-proof solution for professional workflows.

Pros:

• Blazing-fast read speeds (up to 800 MB/s) with an SD Express compatible device.
• Drastically reduces transfer times for 4K/8K video files and high-resolution photos.
• Remains compatible with older UHS-I devices (where it will operate at standard speeds).
• Designed for intensive professional use like burst photography and high-bitrate video recording.

Best for: Photographers, videographers, and content creators equipped with the latest generation of SD Express compatible hardware (cameras, workstations). It's an investment for those who handle very large files daily and for whom every second counts.

See the Samsung P9 Express 256GB Card

Looking for a Memory Card for a Specific Use?

Some devices, like security cameras or dashcams, record continuously. This intensive use, known as 'continuous writing,' puts a heavy strain on cards and requires high-endurance models, often featuring MLC-type memory.

For this type of use, we recommend checking out our selection of MLC memory cards for dashcams.

Frequently Asked Questions about microSD Cards

Which microSD card for a Nintendo Switch?

The Nintendo Switch is compatible with microSD, microSDHC, and microSDXC cards. Nintendo recommends a card with a UHS-I interface and a speed class of U1 or higher. A card with good read speeds (like the Samsung PRO Plus or SanDisk Ultra models) will significantly reduce your game loading times.

How do I check microSD card compatibility?

The safest bet is to check your device's manual (smartphone, camera, etc.) or the manufacturer's website. Look for the SDHC or SDXC logos. As a reminder, an SDXC-compatible device will read SDHC cards, but the reverse is not true. Also, remember to check the maximum capacity your device supports.

What's the difference between V30 and V60 speed classes?

These classes indicate the guaranteed minimum write speed, a crucial factor for video recording. A V30 card ensures a rate of 30 MB/s, which is sufficient for most 4K recording. A V60 card goes up to 60 MB/s, a rate required for more demanding video formats on some professional cameras or for 8K.