SanDisk Ultra SD Memory Card 128GB 140MB/s
- Memory Storage Capacity: 128 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 straightforward, large-capacity card for everyday photo and Full HD video use on compact and point-and-shoot cameras, without the cost of a 4K-rated tier.
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ASIN: B0B7NS71G2Model: SDSDUNB-128G-GN6INCategory: SD Cards
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Overview
A 128GB UHS-I SD card pitched at compact and point-and-shoot cameras, rated Class 10 and UHS Speed Class 1 (U1) with a stated read speed of up to 140MB/s.
This is SanDisk's mid-tier Ultra line, one step below the Extreme and Extreme PRO cards, so it carries U1 rather than U3/V30. That rating covers real-time Full HD (1080p) recording; it is not marketed for sustained 4K capture the way the Extreme PRO cards are.
- 128GB capacity
- Class 10 / UHS Speed Class 1 (U1)
- Up to 140MB/s read
- Built for compact and point-and-shoot cameras
Who it's for
Fits casual shooters using compact cameras or camcorders for photos and Full HD video who want a large 128GB card without paying for the faster tiers. Not the pick for anyone recording 4K UHD, since U1 is a Full HD rating.
Pros and cons
- 128GB of storage in a compact-camera-friendly card
- Rated for real-time Full HD (1080p) recording
- Works with any standard UHS-I card reader
- U1 rating, not built for sustained 4K UHD capture
- No listed shockproof or waterproof rating
Performance notes
The U1 rating specifies a minimum 10MB/s sustained write for real-time HD recording, and the card is stated to reach up to 140MB/s read with a UHS-I-capable reader. It pairs with SanDisk's own SD UHS-I card reader, sold separately, for faster transfers than a laptop's built-in slot.
Specifications
| Brand | Sandisk |
|---|---|
| Model | SDSDUNB-128G-GN6IN |
| Dimensions & fit | |
| Item Weight | 0.01 pounds |
| Item Dimensions L X W | 9.1 × 9.1 inches |
| Item Dimensions D X W X H | 1.3 × 0.9 × 0.1 inches |
| Capacity & performance | |
| Memory Storage Capacity | 128 GB |
| Secure Digital Association Speed Class | Class 10 |
| Flash Memory Video Speed Class | U1 |
| Construction & materials | |
| Color | Grey, Multicolor |
| Compatibility & installation | |
| Hardware Connectivity | SDXC |
| Compatible Devices | Compact to mid-range camcorders, Compact to mid-range cameras |
| Warranty & support | |
| Warranty Description | 10 years |
| Warranty Type | Limited |
| Other details | |
| Flash Memory Type | SDXC |
| Number Of Items | 1 |
| Mfr Part Number | SDSDUNB-128G-GN6IN |
| Additional Features | Drop Proof, Magnetic Proof, Temperature Proof, Water Proof, X Ray Proof |
Frequently asked questions
Is the SanDisk Ultra 128GB good for 4K video?
It is rated U1 for Full HD (1080p) recording, not the U3/V30 spec SanDisk recommends for 4K UHD.
What read speed does this card reach?
Up to 140MB/s with a UHS-I-capable device or reader, per SanDisk's testing.
What camera types is this card meant for?
SanDisk markets it for compact to mid-range point-and-shoot cameras.