AT A GLANCE
The product in context.
SanDisk designed this 256GB High Endurance card for repeated video recording. It is an option for a compatible dash cam or monitoring camera where old clips are regularly overwritten.
This is a researched editorial overview based on the linked manufacturer information. This product is not in the owner’s collection and has not been tested by GadgetsBag. Pros, cons and the assessment are provisional, not firsthand findings.
A CLOSER LOOK
Photo gallery.
Image 1 of 3
Choose a thumbnail, then tap the large photo to enlarge it. Use the viewer arrows or swipe to explore. Product imagery is credited to its source.
THE PUBLISHED DETAILS
Product specifications.
- Model
- SDSQQNR-256G-GN6IA
- Capacity
- 256GB
- Interface
- UHS-I microSDXC
- Speed classes
- Class 10, U3 and V30
- Read / write claim
- Up to 100MB/s read and 40MB/s write
- Endurance claim
- Up to 20,000 hours of Full HD recording under SanDisk test conditions
Source: Manufacturer specifications and feature notes ↗. Manufacturer or listing claims are not our measurements. Check the exact regional variant.
THE PRACTICAL PERSPECTIVE
Overall review.
Check the dash cam’s capacity limit
Find your camera’s supported card size and speed class in its manual. Format the card in the camera as directed and check that the first recording can be played back.
Read the endurance figure alongside your resolution
SanDisk’s 20,000-hour figure applies to Full HD recording under its test conditions. The manufacturer expects fewer hours at 4K. Higher bitrates also reduce how much footage fits before the oldest clips are overwritten.
Save clips you want to keep
Copy an important clip to another device promptly. Use the camera’s lock feature if available and check how that camera handles locked files as the card fills.
Sources and related reading
WEIGH THE TRADE-OFFS
Pros & cons.
Based on published features and editorial assessment; not test results.
Pros
- Designed for repeated video writes
- V30 speed class for compatible recording modes
- 256GB provides room for a longer loop than smaller capacities at the same bitrate
Cons
- Endurance figure is based on Full HD recording
- Some cameras have a lower supported capacity
- Read and write speeds depend on the host device
Who is it for?
Worth considering for
- Dash cam owners recording long drives
- Owners of compatible monitoring cameras with loop recording
Think about first
- Maximum capacity allowed by the camera
- Recording bitrate and resolution
- Camera formatting and clip protection instructions
THE TAKEAWAY
Our assessment.
Choose this card if repeated video writing is the job and your camera supports 256GB. Check playback after setup so you know the camera is saving usable clips.
Provisional assessment · Hands-on testing pendingWhat we still need to test.
These checks will help turn the initial assessment into a hands-on review.
- Recording and playback on a named dash cam
- Loop overwrite behaviour
- Recovery of clips after a power interruption
Read our editorial policy.
