---
title: Secure Digital (SD) Secure Digital High Capacity (SDHC) Secure Digital Extended Capacity (SDXC)
description: "SD cards also come in a range of speed variants. This is often displayed on the card itself as a class rating in a small circle, ranging from Class 2 to Class 10. | CLASS | BEST USED FOR |…"
url: "https://www.szyunze.com/support/secure-digital-sd-secure-digital-high-capacity-sdhc-secure-digital-extended-capacity-sdxc/"
updated: "2023-08-27"
category: Memory Card
---

# Secure Digital (SD) Secure Digital High Capacity (SDHC) Secure Digital Extended Capacity (SDXC)

SD cards also come in a range of speed variants. This is often displayed on the card itself as a class rating in a small circle, ranging from Class 2 to Class 10.

| CLASS | BEST USED FOR | MINIMUM WRITE SPEED |
| --- | --- | --- |
| Class 2 | Standard-definition video recording, general stills photography in compact cameras | 2MBps |
| Class 4 | HD video recording, continuous stills photography in compact cameras | 4MBps |
| Class 6 | Full 1080p video recording, continuous and regular stills photography in high-end compacts or ILCs | 6MBps |
| Class 10 | Full 1080p video recording, professional camcorder or continuous high-resolution stills in SLRs | 10MBps |

![SD card Speed list](http://diskmfr.com/wp-content/uploads/2020/10/video_speed-class_01.jpg)