! style="width:11%;"| Velocità minima di scrittura!! Speed Class !! UHS Speed Class !! Video Speed Class !!style="width:29%;"| Application
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| 2 [[MB/s]] || [[File:SDHC Speed Class 2.svg|28px]] Class 2 (C2) || - || - || SD video recording
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| 4 MB/s || [[File:SDHC Speed Class 4.svg|28px]] Class 4 (C4) || - || - || rowspan=2| [[High-definition video]] (HD) recording including [[Full HD]] (from 720p to 1080p/1080i)
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| 6 MB/s ||[[File:SDHC Speed Class 6.svg|28px]] Class 6 (C6)|| - || [[File:Video Speed Class 6.png|30px]] Class 6 (V6)
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| 10 MB/s || [[File:SDHC Speed Class 10.svg|28px]] Class 10 (C10) || [[File:UHS Class 1.png|28px]] Class 1 (U1)|| [[File:Video Speed Class 10.png|36px]] Class 10 (V10) || [[Full HD]] (1080p) video recording and consecutive recording of HD stills (high-speed data bus), real-time broadcasts and large HD video files (UHS bus)
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| 30 MB/s || - || [[File:UHS Class 3.png|28px]] Class 3 (U3)|| [[File:Video Speed Class 30.png|36px]] Class 30 (V30) || [[4K resolution|4K]] video files at 60/120 fps (UHS bus)
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| 60 MB/s || - || - || [[File:Video Speed Class 60.png|36px]] Class 60 (V60)|| rowspan=2| [[8K resolution|8K]] video files at 60/120 fps (UHS bus)
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| 90 MB/s || - || - || [[File:Video Speed Class 90.png|36px]] Class 90 (V90)
