What is the write speed? only read speed in description

Just tested this card myself. Verified 250MBps read and 120MBps write. It's actually printed on the packaging, too; just not in the product description.

Does it work with the gh5 all-i 400mb/s?

I've bought 4 just for my gh5 camera to use it with all-i 400mb/s!!! Well 2 works perfectly the other 2 are completely broken. After few seconds I've pressed the record button the camera stops with the error message that the card doesn't support the bitrate. I've ordered two new cards to send back the two that are not working. So if you are lucky they works if you are not you can send them back. The card are v60 certified that means that they should support 60Mb/sec. 400mb/s = 400/8 = 50Mb/sec.!!! I think the price is great if they work!

No, el Zoom Q2n usa tarjetas MICRO SD, esta es SD estandar

Does this work for recording 4k video with a go pro 7 black?

Yes it is definitely fast enough fir 4k

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Lexar 128GB (2-Pack) Professional 1667x SD Card, UHS-II, C10, U3, V60, Full HD, 4K, Up To 250MB/s Read SDXC Memory Card, for Professional Photographer, Videographer, Enthusiast (LSD128CBNA16672)

Lexar 128GB (2-Pack) Professional 1667x SD Card, UHS-II, C10, U3, V60, Full HD, 4K, Up To 250MB/s Read SDXC Memory Card, for Professional Photographer, Videographer, Enthusiast (LSD128CBNA16672)

Product ID: 126238374

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Details

Brand
Lexar
Model Name
1667x SD
Flash Memory Type
SDXC
Memory Storage Capacity
128 GB
Compatible Devices
Camera

⚡250MB/s blazing read/write speed

🎥V60 video speed class for flawless 4K capture

🛡️Temperature-proof durability with lifetime warranty

Description

📸 Capture brilliance at the speed of now — don’t let your creativity wait!

BUILT TO ENDURE - Temperature-proof design and lifetime warranty mean your investment is protected in any environment.
DUAL PACK CONVENIENCE - Two 128GB cards give you 256GB total storage—never worry about running out of space on set.
BLAZING FAST TRANSFERS - UHS-II U3 tech delivers up to 250MB/s read/write speeds to keep your workflow lightning quick.
CINEMA QUALITY CAPTURE - V60 rating ensures smooth, uninterrupted 4K, Full HD, and 3D video recording for professional-grade content.
SEAMLESS COMPATIBILITY - Backwards compatible with UHS-I devices, so you can upgrade without missing a beat.

The Lexar 128GB (2-Pack) Professional SD Cards leverage UHS-II U3 technology to deliver ultra-fast 250MB/s read and write speeds, perfect for professional photographers and videographers capturing 4K, Full HD, and 3D content. With V60 video speed class certification, temperature-proof durability, and a lifetime warranty, these SDXC cards ensure reliable, high-performance storage that accelerates your creative workflow while offering backwards compatibility with older devices.

Specifications

Color	Black
Special Feature	Temperature Proof
Read Speed	250 Megabytes Per Second
Item Weight	2 Grams
Warranty Type	Lifetime
Write Speed	250
Hardware Interface	SDHC
Secure Digital Association Speed Class	Class 10
Product Dimensions	1.25"L x 0.95"W
Manufacturer	Lexar International
UPC	843367110803
RAM	128 GB
Item model number	LSD128CBNA16672
Item Weight	0.071 ounces
Item Dimensions LxWxH	0.95 x 1.25 x 0.08 inches
ASIN	B07RCN2BFM
Date First Available	April 30, 2019