What is the benefit of this over sd (sdxc) cards? my nikon z6 ii supports both card types.

I was shocked at the write speed of this card on my Nikon D850. When a camera has a delay between each photo you shoot most think it's the camera. It's not, it's the speed the memory card can read the photo. I hesitated at the cost of this card but decided I'd bite the bullet and get it. I was amazed how fast I can shoot photo after photo. I wasn't even sure the auto focus had time to react. I have one of these and an SD card in my D850 and I have yet to use the SD card.

How does this compare to the model sdcfe-128g-ancnn? best buy is selling for $229.

SDCFE-064G-xxx NN *2 SDCFE-128G-xxx NN *2 SDCFE-256G-xxx NN *2 SDCFE-512G-xxx NN *2 *2 "xxx" is a region code: Japan: JN4 U.S.: ANC Canada: CN4 China: ZN4 Global: GN4 (Europe, Asia Pacific, Australia, Latin America, Middle East and Africa)

What is difference between new and old generation?

Capacity and Speed. And, if it's really 'OLD' then the I/O (Connector) is different.

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Description

🚀 Capture. Create. Conquer with SanDisk Extreme PRO CFexpress.

RUGGED RELIABLE - Waterproof design ensures your data stays safe in any shooting environment, rain or shine.
BROAD COMPATIBILITY - Backwards compatible with select XQD cameras via firmware updates, future-proofing your gear.
BLAZING FAST TRANSFERS - Experience up to 1700MB/s read and 1400MB/s write speeds for seamless 4K RAW video capture and rapid file offloads.
PEACE OF MIND WARRANTY - Lifetime warranty coverage means your investment is protected for the long haul.
NEXT LEVEL WORKFLOW EFFICIENCY - Minimize latency during high-speed recording to keep your creative momentum uninterrupted.

The SanDisk 128GB Extreme PRO CFexpress Card Type B delivers ultra-fast read speeds up to 1700MB/s and write speeds up to 1400MB/s, enabling smooth 4K RAW video recording and rapid data transfers. Its waterproof design and broad compatibility with XQD cameras via firmware updates make it a durable, versatile choice for professional photographers and videographers. Backed by a lifetime warranty, this card ensures reliable performance and long-term peace of mind.

Specifications

Color	Silver
Special Feature	Water Proof
Read Speed	1700 Megabytes Per Second
Item Weight	12 Grams
Warranty Type	Lifetime
Write Speed	1400 MB per second
Hardware Interface	SDHC
Secure Digital Association Speed Class	Class 10
Product Dimensions	39L x 30W mm
Manufacturer	Western Digital Technologies, Inc.
UPC	619659180805
Item model number	SDCFE-128G-GN4NN
Is Discontinued By Manufacturer	No
Item dimensions W x H	4 x 30 x 39 mm
RAM Size	128 GB
Are Batteries Included	No
Lithium Battery Energy Content	2 Kilowatt Hours
Lithium Battery Packaging	Batteries packed with equipment
Lithium Battery Weight	2 g
Number Of Lithium Ion Cells	5
Nombre de cellules Lithium-Métal	5
Item Weight	12 g

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