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SmallRig SD 4.0 Card Reader

BH #SM4870 • MFR #4870
4 reviews
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SmallRig SD 4.0 Card Reader
Key Features
  • Ultra Fast 312 MB/s Data Transfer Speed
  • SDXC and microSDXC Card Slots
  • USB-C Cable with Right-Angle Connector
  • MagSafe Magnetic Mount Compatible
The SD 4.0 Card Reader from SmallRig is an ultra-high-speed card reader designed to conveniently magnetically attach to a smartphone, tablet, or laptop that can transfer data quickly and minimize downtime while shooting. It features a MagSafe-compatible magnetic mounting surface, plus a built-in USB-C cable with a right-angle plug that won't get in the way. This stylish SD 4.0 card reader has a speed of 312 MB/s and can transfer 1GB of data in just 3 seconds.
More Details
In Stock
No Store Display
$25.99
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Used for $18.95
Data Transfer Rate
104 MB/s
312 MB/s
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800-606-6969

SmallRig SD 4.0 Card Reader Overview

The SD 4.0 Card Reader from SmallRig is an ultra-high-speed card reader designed to conveniently magnetically attach to a smartphone, tablet, or laptop that can transfer data quickly and minimize downtime while shooting. It features a MagSafe-compatible magnetic mounting surface, plus a built-in USB-C cable with a right-angle plug that won't get in the way. This stylish SD 4.0 card reader has a speed of 312 MB/s and can transfer 1GB of data in just 3 seconds.

Compatible Operating Systems
  • Windows
  • Mac
  • Linux
  • Android
  • HarmonyOS
  • iOS
  • iPadOS

SmallRig SD 4.0 Card Reader Specs

Media Card Reader
1x microSDXC
1x SDXC
Host Connection
USB-C 3.0 / 3.1/3.2 Gen 1 via Integrated Cable
Power Source
Bus Powered
Enclosure Material
Aluminum
Dimensions
6.7 x 2.3 x 0.4" / 169.7 x 58.5 x 10 mm
Weight
1.8 oz / 50 g
Packaging Info
Package Weight
0.2 lb
Box Dimensions (LxWxH)
4.7 x 3.85 x 1.35"

SmallRig SD 4.0 Card Reader Reviews

Good for transferring photos to iPhone

By Scott
Rated 5 out of 5
Date: 2026-04-19

MagSafe works well and files transfer quickly even from a mid tier SD card. I had to look up the exact process to import photos onto an iPhone but now it’s so much easier and faster than trying to do wireless transfers from my camera maker’s app.

Use with caution!

By Michael
Rated 3 out of 5
Date: 2026-01-05

This reader has a bug in the firmware (with Android at least) where if you plug the card into the reader before you connect the reader to the phone the card will come up as unformatted. In order to use this reader you must connect it to your device first then plug the card into the reader. Other than that, its an awesome reader! I love the way it connects to my Peak Design case and (once you get it to read the card) it backs up files very quickly. I just wanted people to be aware of the issue so they don't do what I did and assume there is something wrong with their camera all of a sudden while they are traveling lol

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