SDSDUNR Sandisk SDHC XC UHS 128GB/100MB

The SanDisk Ultra SDHC/SDXC UHS-I (SDSDUNR) 128GB card is the quintessential "reliable workhorse" for casual photography and everyday storage. It sits comfortably in the entry-level tier of SanDisk’s lineup—designed for users who need dependable capacity without the high price tag of professional "Extreme" or "Extreme Pro" cards.

Here is an overview of its performance, build, and ideal use cases.

Technical Specifications

Performance Breakdown

• The "100MB/s" Reality: It’s important to note that the advertised 100MB/s is the maximum read speed. This means you’ll see those speeds when transferring files from the card to your computer. The write speed (how fast the camera saves the image) is significantly lower, usually hovering around 10–30MB/s.

• Video Capabilities: This card is rated Class 10 and U1, making it perfect for standard Full HD (1080p) video recording. However, it is not recommended for 4K video, as the sustained write speeds may cause dropped frames or recording errors.

• Capacity: At 128GB, it can hold thousands of high-resolution JPEG photos or several hours of Full HD video, making it a great "vacation card" where you don't want to swap media constantly.

Reliability & Build

SanDisk markets the Ultra series as "Life-Proof." While it lacks the extreme ruggedness of their professional lines, it is still built to withstand common environmental hazards:

• Waterproof: Can survive accidental splashes.

• Temperature Proof: Operates in a wide range of climates.

• Shock/X-Ray Proof: Safe for airport security and minor drops.

Who is this for?

Best For:

• Point-and-shoot cameras and entry-level DSLRs/Mirrorless cameras.

• Photographers who shoot primarily in JPEG rather than massive RAW files.

• Students and hobbyists recording 1080p video.

• General file storage and transfer for laptops with SD slots.

Skip this if:

• You are shooting 4K video (look for a V30 or U3 rated card).

• You do high-speed burst photography (e.g., sports or wildlife), as the card will struggle to clear the camera's buffer quickly.