SanDisk Ultra microSD 64 GB 140MB/s

What buyers think

Buyer feedback is broadly consistent around reliability and “it just works” day-to-day behavior. Several reviews mention smooth use in common electronics scenarios, including app and media storage, as well as projects like Raspberry Pi where the card handled OS and typical workloads without disconnects or corruption issues so far. People also tend to highlight that it feels fast enough for everyday tasks, particularly for reading and general responsiveness, rather than positioning it as a specialist high-endurance or write-optimized card.

What you’re getting

The SanDisk Ultra microSD 64 GB (microSDXC, UHS-I) is designed to expand storage in devices that support microSD. It targets buyers who want quicker transfers than older slower cards, plus A1-rated performance intended to help supported phones load apps faster when the device supports app storage on microSD.

Key specs that matter in real use

Read speed up to 140MB/s

The headline feature is up to 140MB/s read speed, which can make a difference when moving large photo and video libraries, transferring files to a computer, or offloading content from a phone. Actual speed depends on the device and reader, but the card is positioned for faster day-to-day file movement rather than basic storage-only use.

A1 app-performance rating

If your Android phone or tablet supports installing or running apps from microSD, the A1 rating is meant to support faster app launch and performance. This is particularly relevant for buyers who want to keep more apps installed and reduce internal storage pressure.

Compatibility notes

This is a microSDXC UHS-I card, commonly used with Chromebooks, Android smartphones, and tablets, and also works in devices that accept microSDXC. One practical advantage for many buyers is pairing the card with a compatible microSD card reader, including SanDisk MobileMate USB 3.0 for faster transfers.

Pros and cons for different buyers

Best for

• Android owners who want storage expansion for photos, video, and app offloading (where supported)
• People who regularly transfer files from a phone to a computer using a UHS-I USB reader
• General-purpose microSD use in devices like Raspberry Pi for OS and typical workloads that are not write-heavy
• Shoppers who prefer mainstream reliability over specialized endurance

Who should avoid it

• Anyone planning constant write-intensive activity, such as continuous data logging or database-style workloads, since this line is not aimed at heavy write endurance
• Buyers who need maximum sustained performance for professional workflows, where a dedicated performance or endurance tier would be a better match

Performance and reliability expectations

Based on available buyer feedback, the strongest pattern is practical reliability and good everyday responsiveness. The card appears to handle typical OS and general project workloads well, but the card’s positioning is still mainstream. If your use case involves frequent, repeated writes (writing and rewriting large volumes all day), you should consider moving up to an endurance-focused model instead of relying on a standard Ultra tier.

Price and availability

You can check the latest price and ensure you’re getting the correct 64 GB SDSQUAB-064G-GN6MN model on Amazon.

Buy on Amazon

Verdict

The SanDisk Ultra microSD 64 GB with up to 140MB/s read speed is a reliable, easy pick for shoppers who want faster file transfers and A1 app-performance support in compatible Android devices. It is an especially good fit for everyday storage expansion, media capture, and general electronics projects, with the main limitation being that it is not designed for heavy, constant write workloads.

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