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See High Speed Micro SD Card
- When looking for a high-speed microSD card, consider the following:
- Most microSD cards are UHS-I, with a theoretical maximum speed of 104 MB/s1.
- UHS-II cards have an extra row of pins and can reach up to 312 MB/s1.
- Look for cards rated U3 or V30, which have a minimum sequential write speed of 30 MB/s and are suitable for 4K video2.
- UHS Speed Class 1 (U1) has a minimum write speed of 10 MB/s, while UHS Speed Class 3 (U3) has a minimum write speed of 30 MB/s3.
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Most microSD cards available today are UHS-I, which have a theoretical maximum speed of 104 MB/s. There are also UHS-II cards, which have an extra row of pins on the back and can reach up to 312 MB/s. (A UHS-III standard exists as well but hasn’t seen wide adoption.) These are labeled on the card with a Roman numeral I or II.www.engadget.com/computing/accessories/best-…Look for a card rated U3. Cards rated U3 or V30 have a minimum sequential write speed of 30 MB/s, enough for 4K video. V60 and V90 microSD cards, which are fast enough to record 8K video, are expensive and require relatively rare UHS-II bus devices, so we didn’t test any.www.nytimes.com/wirecutter/reviews/best-micros…The next speed class up is the UHS (Ultra-High Speed) Speed Class and it’s denoted with the “U” symbol. There are two ratings within the UHS Speed Class: U1 (UHS Speed Class 1): minimum write speed of 10MB/s U3 (UHS Speed Class 3): minimum write speed of 30MB/swww.kingston.com/en/blog/personal-storage/mem… SanDisk Micro SD Express, 256 GB Micro SD Card, Read …
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