SanDisk Ultra SDXC UHS-I Memory Card 64GB
- Memory Storage Capacity: 64 GB
- Secure Digital Association Speed Class: Class 10
- Flash Memory Video Speed Class: U1
- Flash Memory Type: SDXC
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A dependable, inexpensive 64GB card for Full HD cameras and everyday photo backup, though not built for 4K video recording.
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ASIN: B08KSW94XNModel: SDSDUNR-064G-GN3INCategory: SD Cards
Overview
A 64GB SDXC card rated UHS-I Class 10 U1 with up to 100MB/s transfer speed, built for offloading photos and Full HD video from cameras and camcorders rather than heavier 4K workloads.
SanDisk's Ultra line trades top-tier write speed for a lower price and broad device compatibility, which is why it shows up as the default card bundled with point and shoot and bridge cameras. The U1 rating covers Full HD recording; anyone shooting 4K should look at a U3 or V30 card instead.
- 64GB SDXC capacity
- 100MB/s rated read speed
- UHS-I, Class 10, U1 rated
- Full HD video support
Who it's for
Suits owners of bridge cameras, DSLRs shooting stills and 1080p video, and anyone who just needs reliable phone to card photo backup. Not the choice for 4K video or fast burst sports photography, where the U1 speed class becomes a bottleneck.
Pros and cons
- Works across a wide range of camera models
- Reliable for phone and camera photo backup
- Low price for the 64GB capacity
Performance notes
Rated at 100MB/s read, though as a Class 10 U1 card its write speed is lower and is what actually governs how fast a camera clears its buffer between shots. One reviewer measured speeds well under the rated figure, consistent with U1 being a read spec rather than a write promise.
Specifications
| Brand | SanDisk |
|---|---|
| Model | SDSDUNR-064G-GN3IN |
| Dimensions & fit | |
| Item Weight | 0.03 pounds |
| Item Dimensions D X W X H | 5.1 × 3.1 × 0.4 inches |
| Capacity & performance | |
| Memory Storage Capacity | 64 GB |
| Secure Digital Association Speed Class | Class 10 |
| Flash Memory Video Speed Class | U1 |
| Construction & materials | |
| Color | Black |
| Compatibility & installation | |
| Hardware Connectivity | SDHC, SDXC |
| Compatible Devices | Camera |
| Included components | |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Description | 5 years |
| Warranty Type | Limited |
| Other details | |
| Flash Memory Type | SDXC |
| Number Of Items | 1 |
| Mfr Part Number | SDSDUNR-064G-GN3IN |
| Additional Features | Class 10;Compact |
Frequently asked questions
Does the SDSDUNR-064G-GN3IN support 4K video?
No, it's rated U1 for Full HD; 4K recording calls for a U3 or V30 rated card instead.
Is 100MB/s the write speed?
No, that's the rated read speed. Write speed isn't specified beyond the Class 10 U1 rating, and one reviewer reported real-world transfers well below 100MB/s.