Secure Digital (SD) cards speed rating for writing video?

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I'm trying to understand the video write speed for SD cards. I found info in this link: https://www.sdcard.org/developers/overview/speed_class/index.html There is a table that shows three different classes: Speed Class, UHS Speed Class and Video Speed Class. I don't understand how an SD card can have a rating of C10, U3 and V90 like this one: Transcend 64GB SDXC/SDHC 700S Memory Card TS64GSDC700S (link below). A class 10 (C10) has a write speed of 10MB/s, U3 is 30MB/s and V90 is 90MB/s. What am missing? How should I look at this? What's the minimum write speed for this SD card?

Thanks

https://www.amazon.com/Transcend-TS64GSDC700S-64GB-SDXC-Memory/dp/B07DSV9HG2?pf_rd_p=27933938-66d5-4a49-965b-3c0c25216562&pd_rd_wg=Cq9RZ&pf_rd_r=K96AGXD40TGMKWJ5DJTE&ref_=pd_gw_cr_simh&pd_rd_w=iT04m&pd_rd_r=e42c17c6-1287-40ad-bd40-1563c66bcdf8

Rodo

Posted 2019-08-27T18:27:25.943

Reputation: 101

2Video write speed requires use of a SD card mode that cameras employ. PCs do not use that "video write" mode. Video write speed is irrelevant for PC use of SD cards. – sawdust – 2019-08-27T19:11:11.063

No answers