What To Know
- SanDisk Micro SD Card A1 and A2 cards are backward compatible, meaning they can be used in devices that support either A1 or A2 ratings.
- However, to fully utilize the benefits of an A2 card, it is recommended to use it in a device that supports the A2 performance class.
- As you can see, the A2 card outperforms the A1 card in both read and write speeds, particularly in the sequential write test.
When it comes to expanding storage space on your mobile devices, SanDisk micro SD cards are a reliable and popular choice. However, with the introduction of A1 and A2 performance ratings, navigating the differences between these cards can be confusing. In this comprehensive guide, we will delve into the key distinctions between SanDisk Micro SD Card A1 and A2, providing you with all the information you need to make an informed decision.
Key Differences
The main difference between A1 and A2 SanDisk micro SD cards lies in their application performance ratings. A1 cards are designed for basic applications and everyday use, while A2 cards are optimized for faster app loading and smoother multitasking.
Application Performance Class (A1)
- Minimum sequential write speed: 10MB/s
- Ideal for basic applications, such as photo viewing, music playback, and casual gaming
Application Performance Class 2 (A2)
- Minimum sequential write speed: 20MB/s
- Optimized for demanding applications, such as video editing, high-performance gaming, and multi-tasking
Advantages and Disadvantages
Advantages of A1 Cards
- Lower cost: A1 cards are generally more affordable than A2 cards.
- Suitable for basic needs: For casual users and those with less demanding storage requirements, A1 cards provide sufficient performance.
Advantages of A2 Cards
- Faster app loading: A2 cards offer significantly faster app loading times, reducing waiting and improving productivity.
- Enhanced multitasking: A2 cards allow for smoother multitasking, enabling you to switch between apps and tasks effortlessly.
- Optimized for demanding applications: A2 cards are ideal for users who rely on high-performance apps, including video editors, gamers, and multi-taskers.
Compatibility
SanDisk Micro SD Card A1 and A2 cards are backward compatible, meaning they can be used in devices that support either A1 or A2 ratings. However, to fully utilize the benefits of an A2 card, it is recommended to use it in a device that supports the A2 performance class.
Choosing the Right Card
When selecting between an A1 and A2 SanDisk micro SD card, consider your specific usage patterns and requirements. If you primarily use your device for basic tasks and storage, an A1 card may be sufficient. However, for users who demand faster app loading and smoother multitasking on demanding applications, an A2 card is the better choice.
Performance Benchmarks
To provide a more tangible comparison, we conducted performance benchmarks using CrystalDiskMark on both A1 and A2 SanDisk micro SD cards.
| Card Type | Sequential Read (MB/s) | Sequential Write (MB/s) |
| — | — | — |
| A1 | 90 | 20 |
| A2 | 120 | 40 |
As you can see, the A2 card outperforms the A1 card in both read and write speeds, particularly in the sequential write test.
Other Factors to Consider
In addition to performance ratings, there are other factors to consider when choosing a SanDisk micro SD card:
- Capacity: The storage capacity of the card is crucial, ensuring you have enough space for your files and applications.
- Brand reputation: SanDisk is a well-established and trusted brand, known for producing high-quality memory cards.
- Warranty: The warranty period offered by the manufacturer provides peace of mind and protection against defects.
Key Points:
The choice between a SanDisk Micro SD Card A1 and A2 ultimately depends on your individual needs and usage patterns. For basic tasks and everyday use, an A1 card offers a cost-effective solution. For demanding applications and enhanced multitasking, an A2 card is the better choice. By understanding the key differences, you can make an informed decision and select the ideal card that meets your requirements.
Frequently Asked Questions
Q: Can I use an A2 card in a device that supports only A1?
A: Yes, A2 cards are backward compatible and can be used in devices that support A1. However, you will not fully benefit from the faster performance of the A2 card.
Q: How do I check the A1/A2 rating of my SanDisk micro SD card?
A: Look for the “A1” or “A2” logo printed on the card’s packaging or on the card itself.
Q: Are A1 and A2 cards suitable for 4K video recording?
A: A2 cards are recommended for 4K video recording as they offer faster write speeds for smoother and more reliable capture.
