
SanDisk
SanDisk 64G_TF_Ultra_San_x2 Ultra 64GB microSDXC 2-Pack
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:Oct 21, 2026.Price and availability are subject to change — details.
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Overview
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
Frequently Asked Questions
What is the real-world sequential read speed of these SanDisk Ultra cards, and does it match the UHS-I spec?
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.
Are these cards compatible with devices that use microSDHC, and is the 64GB capacity accessible on older hardware?
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.
What does the UHS-I designation mean for video recording, and what's the minimum card speed needed for 4K?
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.
Does the included card reader work with both USB-A and USB-C ports?
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.
Is this a genuine SanDisk product, and how do I verify authenticity?
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.