Delkin Devices Hyperspeed microSDXC Memory Card with SD Adapter

Fast, travel-friendly microSDXC media for underwater action cameras, topside drones, and dependable 4K dive workflows.

Where this fits best in a complete setup is simple: inside any microSDXC-compatible action cam or device that needs reliable V30-rated recording and faster end-of-day offloads.

Illustration of the Delkin Hyperspeed 128GB microSDXC memory card with the included SD adapter.

The Delkin Devices Hyperspeed microSDXC Memory Card with SD Adapter is a card designed for compact cameras and devices that rely on microSD media, including action cameras, drones, GPS units, fish finders, and other mobile systems. For underwater shooters, the main reason to care is reliability: when you are recording 4K video, high-frame-rate clips, HDR footage, time-lapse sequences, or burst photos on a dive trip, the card needs to keep up without becoming the weak point in the system. Delkin rates this card at up to 195 MB/s read and 160 MB/s write, with Class 10, U3, V30, and A2 ratings, so it is built for data-heavy capture and faster offloads after the dive day. It also supports raw, JPEG, and continuous burst shooting, includes a full-size SD adapter and protective case, and is designed to resist water, shock, and X-rays with built-in error correction and wear leveling.

In our experience at Bluewater Photo, this is a strong fit for underwater action-camera users and travelers who want dependable microSDXC media, perfect for underwater action cameras like the GoPro Hero 13 or the the popular Insta360 X5.

BEST FOR

Action cameras, drones, and other microSDXC-based devices used for underwater video, travel, and everyday backup capture.

MAIN ADVANTAGE

Listed speeds up to 195 MB/s read and 160 MB/s write with V30/U3/A2 ratings for 4K-oriented workflows.

COMPATIBILITY NOTE

Your device must support microSDXC; the included adapter lets you use the card in many SD-compatible slots, but it does not change the underlying card format.

DIFFERENTIATOR VS. ALTERNATIVES

On listed specs alone, Delkin posts a higher write-speed claim than several popular 128GB V30 UHS-I alternatives shoppers often compare it against.

TRADEOFF TO UNDERSTAND

This is still a UHS-I microSDXC V30 card. If your camera specifically requires full-size SD, UHS-II, or CFexpress media, this is not the right substitute.

Quick Specs

Capacity

128GB

Card Type

microSDXC

Bus Type

UHS-I

Speed Class

Class 10 / U3 / V30 / A2

Max Read

195 MB/s

Max Write

160 MB/s

Minimum Sustained Write

30 MB/s (V30)

Capture Support

4K, Full HD, HDR, high-frame-rate, time-lapse, raw/JPEG/burst

Included

SD adapter and protective storage case

Durability

Water, shock, and X-ray resistant

Compatibility

WORKS WITH

Action cameras, drones, GPS units, fish finders, and other mobile devices that accept microSDXC cards.
SD-compatible devices when the included SD adapter is used.
Underwater action-cam systems where the camera itself records to microSD media.

Important: housing compatibility is usually not the deciding factor here; the camera or device card slot is.

REQUIRES

Your device must support microSDXC rather than only older microSDHC capacities.
Check your camera or device manual for approved media type, maximum supported capacity, and recommended speed class.
If you are using a full-size SD slot, install the microSD card into the included adapter first.

Compatibility varies by system — contact Bluewater Photo to confirm your setup.

OPTIONAL GEAR

Spare memory card for multi-dive days or liveaboard travel.
microSD/SD card reader for faster backup workflow.
Portable SSD or laptop backup system for daily file copies.
Card wallet or hard memory case for better organization on trips.

If your priority is redundancy, we usually recommend carrying at least one spare card rather than relying on a single card for the whole trip.

Perfect For

Travel dive video

A solid fit for divers using action cameras who want dependable 4K-capable media and quicker end-of-day backups.

GoPro-style underwater kits

Best when your camera, housing, and travel workflow are built around microSDXC media rather than full-size SD or CFexpress.

Drone + dive combo trips

Useful for travelers who want one fast microSDXC card family for both topside drone use and underwater action-cam use.

Backup or spare media

An easy add-on if you want a second card in your kit so one full card does not end your shooting day.

Less ideal for: larger mirrorless or DSLR underwater systems that require full-size SD, CFexpress, or other camera-specific approved media types.

Why Buy From Bluewater Photo

Content reviewed by Bluewater Photo staff with real-world experience supporting, selling, and configuring underwater camera systems.

When customers ask whether a card will work, we look at the actual system requirements first: card format, supported capacity, speed class, and whether the device records to microSD or another media type.

That kind of setup guidance helps buyers avoid the most common mistake with memory cards underwater: ordering a card that looks fast on paper but is the wrong format for the camera they are actually taking on the trip.