SanDisk Ultra SD Memory Card 128GB 140MB/s
- 128 GB SDXC UHS-I card
- Up to 140 MB/s read, Class 10 and U1
- Drop, water, temperature, magnet and X-ray proof
- Compact to mid-range cameras and camcorders listed
- 4.54 g, full-size SD format
- 10 year limited manufacturer warranty
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A full-size SD card for everyday photo and video cameras, with fast reads and a long warranty. It carries the lower video class, so demanding video modes call for a faster card.
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ASIN: B0B7NS71G2Model: SDSDUNB-128G-GN6INCategory: SD Cards
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Overview
Sliding into the SD slot of a compact camera or camcorder, this SDXC card stores photos and video on flash memory. The body is rated against drops, water, magnets, temperature swings and X-rays.
Large capacity and a quick read figure make offloading a day of shots less of a wait. The write rating stays at the basic video class, and the listing frames the card for compact to mid-range gear only.
Who it's for
A traveler or family photographer who wants a large, tough card for a compact camera. Videographers recording demanding footage should read the speed class before buying. Phone and action camera users need the smaller card format.
Pros and cons
- Large capacity for a full day of shots
- Fast read speed for offloading
- Rated against water and X-rays
- Long manufacturer warranty
- Lower video speed class
- Aimed at compact to mid-range gear
- Full-size SD format only
- Write speed figure is minimal
Performance notes
Read speed applies when copying files off the card to a computer through a fast reader, and cameras write at the lower rated speed. The speed class sets the minimum sustained write rate for video, so footage that exceeds it can drop frames. Real speeds depend on the host device.
Specifications
| Brand | Sandisk |
|---|---|
| Model | SDSDUNB-128G-GN6IN |
| Dimensions & fit | |
| Item Dimensions D X W X H | 1.26 x 0.94 x 0.09 inches (D x W x H) |
| Item weight | 4.54 g |
| Item Dimensions L X W | 9.1"L x 9.1"W |
| Capacity & performance | |
| Memory Storage Capacity | 128 GBhigher than 68% of 20 sd cards |
| Secure Digital Association Speed Class | Class 10 |
| Flash Memory Video Speed Class | U1 |
| Media Speed | 10 MB/s |
| Read Speed | Up to 140 MB/s |
| Construction & materials | |
| Color | Grey, Multicolor |
| Compatibility & installation | |
| Compatible Devices | Compact to mid-range cameras and camcorders |
| Warranty & support | |
| Warranty Description | 10 year limited manufacturer |
| Other details | |
| Flash Memory Type | SDXC UHS-I |
| Additional Features | Drop, magnetic, temperature, water and X-ray proof |
| Mfr Part Number | SDSDUNB-128G-GN6IN |
Closest rivals on specs
INLAND SDHC Memory Card 32GB 2 Pack- Memory Storage Capacity 128 vs 32 GB (+300%)
Kodak SDHC UHS-I U1 Memory Card 32GB- Item Weight 0.01 vs 0.02 pounds (-50%)
- Memory Storage Capacity 128 vs 32 GB (+300%)
Frequently asked questions
Does the SanDisk Ultra 128GB work in a 4K camera?
The listing frames it for compact to mid-range cameras and camcorders and gives only a U1 and Class 10 rating. It makes no 4K claim.
Is the SanDisk Ultra a microSD card?
No. It is a full-size SDXC card at 1.26 by 0.94 inches, so a microSD-only device will not take it.
How long is the warranty on this SanDisk card?
A 10 year limited manufacturer warranty is listed.