Question 1

What's the difference A1 A2 ?

Accepted Answer

A1 read speed is up to 100mb/s while A2 is at up to 160mb/s, write speed for both is at 90mb/s. A2 is also optimized for cell phone applications.

Question 2

Is this product counterfeit? if i order and try to register it on sandisk’s website for use with recoverypro, will it be accepted?

Accepted Answer

Your concerns are valid in light of the fact that on a popular product bidding site (rhymes with "flea") it was once estimated that 95% of all memory offered on the site were counterfeits. Amazon is not off the hook either. I have seen sellers posting memory at ridiculous prices, such as a 1TB unknown-brand microSD card for $50.

Assuming you are not able to perform card tests, here's how I buy memory:

- I buy ONLY FROM ESTABLISHED sellers (defined as a seller who specializes only in card products, has hundreds of five star ratings, has a history of good comments and reviews, and has a no-questions-asked return policy).

- I now buy ONLY the brand names. Samsung, SanDisk, PNY, Kingston, etc. (stick to the brand names, that's half the battle won).

- When you get the card check closely for evidence of repackaging (soiled card, fingerprints or smudges, factory seal broken, etc.) If you see such evidence, send the card back.

- Assuming you know how to check the card "properties" on your computer or phone, so that. Counterfeiters can fool this system, but it is better than nothing.

- Finally, perform a few tests: 1) transfer files TO the card, that's testing the write speed. Windows will show you the transfer/write rate. Assuming there's no bottlenecks in your card reader or on the PC, you should see transfer speeds close to what's claimed on the package and website ad; and 2) transfer files from the card to the PC. See how fast a transfer or "upload" takes.

- Finally, use a FREE (German) program called "h2testw" that works on MS Windows (has an English language option when you open it). That will test all elements of your card. Pop the card into the reader, connected to your PC, open h2testw and test away.

Question 3

Can this handle 60 fps 4k?

Accepted Answer

Yes, It does 4K 60fps with no issues. I use it in my GoPro Hero 6 and have never had issues. Also works great for 2.7K 120fps.

Question 4

Does the 1tb card work on Nintendo Switch?

Accepted Answer

Yes, the 1TB SanDisk "Extreme" card works on the Switch. All sizes and speeds of MicroSD, up to 2TB (whenever those get made), will work. Nintendo recommends a speed of at least Class 10 and UHS-I, though.

That being said, the Switch's MicroSD card reader can only read at speeds up to 104MB/s. The "Extreme" and "Extreme Pro" cards are rated up to 160MB/s and 170MB/s, respectively. The Switch also cannot take advantage of the "A2" and "V30" specs, so buying the *fastest* card isn't necessarily the best option.

The cheaper SanDisk "Ultra" cards (rated up to 120MB/s) will work perfectly fine, leave enough comfortable overhead for the speed, and save you money.

Other reputable MicroSD card brands are: Kingston, Lexar, PNY, and Samsung.

ASIN	B07P7M6K35
Additional Features	Drop Proof, Temperature Proof, Water Proof, X Ray Proof
Best Sellers Rank	#41 in Micro SD Memory Cards
Brand	Sandisk
Color	Red
Compatible Devices	Camera, Smartphone
Customer Reviews	4.8 4.8 out of 5 stars (354,758)
Flash Memory Type	Micro SD, Micro SDHC, Micro SDXC
Global Trade Identification Number	00619659173760
Hardware Connectivity	microSDXC
Item Dimensions L x W	0.04"L x 0.59"W
Item Weight	4.54 g
Manufacturer	Western Digital Technologies, Inc.
Media Speed	90 MB
Memory Storage Capacity	512 GB
Mfr Part Number	619659173760
Model Name	Extreme
Model Number	6.19659E+11
Read Speed	160 megabytes_per_second
Secure Digital Association Speed Class	Class 10
UPC	619659173760
Unit Count	1 Count
Warranty Description	Lifetime Limited Warranty
Warranty Type	Lifetime Limited

512GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 160MB/s, C10, U3, V30, 4K, A2, Micro SD - SDSQXA1-512G-GN6MA

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