SanDisk

SanDisk 64G_TF_Ultra_San_x2 Ultra 64GB microSDXC 2-Pack

4.5 (507 reviews)

Double your device storage headroom with two Class 10 UHS-I cards that transfer and play back without making you wait.

$19.83*$26.33Save 24%
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.

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Overview

The SanDisk Ultra 64GB microSDXC 2-Pack delivers 128GB of total UHS-I storage in a format that fits virtually every modern mobile device, action camera, and single-board computer. Class 10 / UHS-I places a minimum 10MB/s write floor on both cards, but the Ultra line typically achieves sequential read performance in the 80–100MB/s range under ideal host conditions — fast enough to eliminate perceptible lag when loading app data, streaming cached content, or offloading photos to a laptop via the included card reader. The V1 / U1 speed class rating is well-matched to 1080p video and burst JPEG workflows; users targeting sustained 4K capture should verify their camera's speed class requirements before assuming these cards will keep up.

The practical case for this 2-pack is straightforward: for device owners managing storage across a phone and a secondary device, or photographers who want a spare card in the bag without paying for a second retail purchase, the bundle math works in your favor. The included Everything But Stromboli USB card reader adds immediate utility for file transfers without hunting for a separate accessory. SanDisk's long reliability track record in the microSD market is the most compelling reason to choose this over no-name alternatives at similar price points — the counterfeit microSD market is significant, and established brands like SanDisk carry meaningful quality control advantages that show up in long-term data integrity. These are workmanlike cards: not the fastest, not the highest capacity, but dependably correct for the applications they're rated for.

Key Features

Two pack Sandisk Ultra 64GB Micro SD Card with UHS-1

Everything But Stromboli (tm) Memory Card Reader (Color May Vary)

Eco Friendly Bulk Packaging!

Specifications

Brand
SanDisk
Model
64G_TF_Ultra_San_x2
Capacity per Card
64GB
Total Capacity (2-Pack)
128GB
Card Type
microSDXC
Speed Class
Class 10, UHS-I (U1)
Quantity
2 cards
Includes
2x 64GB microSDXC cards, Everything But Stromboli card reader
Packaging
Eco-friendly bulk packaging

Pros & Cons

👍 Pros

  • The 2-pack configuration means you get 128GB of total storage while keeping cards in separate devices simultaneously — useful for photographers running a camera and a backup device in parallel.
  • Class 10 / UHS-I rating guarantees a minimum sustained write speed adequate for burst shooting and 1080p video on smartphones, tablets, and action cameras.
  • The included Everything But Stromboli card reader means you can offload files without relying on a cable or the host device's USB connection.
  • 64GB per card provides enough headroom for extended shooting sessions before requiring an offload — roughly 1–2 hours of 1080p video or thousands of JPEG images per card.
  • SanDisk's microSD reliability track record across millions of deployed units makes this a lower-risk choice than lesser-known brands at the same price point.

👎 Cons

  • The U1 speed class rating means these cards are not rated for sustained 4K video capture — photographers shooting 4K need to verify their camera's requirements and may need V30 or U3 rated cards instead.
  • The bundled card reader is a third-party accessory (Everything But Stromboli) rather than a SanDisk-branded reader, with no guaranteed USB-C compatibility for modern laptops.
  • Eco-friendly bulk packaging means no retail case or protective housing is included — cards and reader arrive without the clamshell protection of retail boxed versions.
  • microSDXC format limits compatibility to SDXC-capable devices only — not backward-compatible with microSDHC-only hardware.
  • At 64GB per card, these are mid-capacity options — power users running high-bitrate video or large RAW workflows will fill them faster than expected on a long shoot day.

Frequently Asked Questions

SanDisk rates the Ultra microSDXC line at up to 80–100MB/s sequential read depending on the generation — UHS-I with Class 10 rating sets a minimum 10MB/s write floor, but peak reads in this series consistently outperform that minimum. Actual speeds depend on the host device's UHS-I bus implementation.
The CA500 cards are microSDXC format, which requires a host device with SDXC compatibility. Older devices that only support microSDHC (up to 32GB) will not read these cards — confirm your device's maximum supported capacity before purchase.
UHS-I sets the interface bus speed ceiling. For 4K video at 60fps, you typically need a V30 (Video Speed Class 30) or higher rating — the Ultra line's Class 10 / U1 rating covers 1080p reliably but may not sustain the write speeds required for 4K capture on all cameras. Check your camera's recommended speed class.
The bundled Everything But Stromboli reader is a standard USB reader — connection type varies by included version. Users with USB-C-only laptops should verify compatibility or use an adapter, as the included reader may be USB-A.
SanDisk Ultra cards can be verified through SanDisk's official authentication tools. When purchasing, confirm the listing is fulfilled by a reputable seller — counterfeit microSD cards are common in this capacity range and will fail speed and capacity verification tests.