photowiki:card

One-for-All good article on cards

Card Type for Camera Storage

  • most common type: SD card
  • high end sports camera: CF card
  • high end video camera: 2.5 inch SSD
  • other cards: rarely used

SD card

There are 3 size of SD card

  • Full size SD: most common type for cameras
  • miniSD: rarely seen nowadays
  • microSD: most common type for slim compact cameras and smart phones

We are mainly talking about Full size SD card From Here;

SD card has 3 property to consider when choosing

  1. capacity: how many GBs of storage
    • category label based on capacity:
      • SD: 1-2 GB
      • SDHC: 4-32 GB
      • SDXC: 64-128 GB and upto 2TB
  2. Maximum Read/Writing speed: how fast it can quickly move in/out data
    • category label based on max R/W speed: (Mbps=mega bit per seconds, MBps = mega Byte per second = 8 Mbps)
    • normal lower uhs-i and lower cards use mbps (bit) to make number looks bigger, each gen speed also different
    • while higer uhs-i and uhs-ii card use MBps (Byte) as they are next gen card fast
      • R 280MB/s W 250MB/s : Video Pro
      • R 95MB/s W 90MB/s : Photo Pro
      • R 90MB/s W 60MB/s : Photo Burst Good
      • R 90MB/s W 40MB/s : Photo Burst Good
      • R 80MB/s : Good
      • R 48MB/s : Average
      • below : Low
  3. Example chart :
    • for 4K video, 100mbps, = 12.8MBps
    • for 4k video, 60mbps, = 7.5MBps
    • for FHD video, 28mbps, = 3.5MBps
    • so V30 card and 30MBps write is more than enough for common 4k video and below
    • while 60MP high res sensor burst shots will require far more write speed than video.
  • uhs-1 limit: 104MBps
name video rate Read Write price (2023)
SandDisk Extreme U3 UHS-I V30 170MBps 80MBps 64GB = 13sgd
SandDisk Extreme U3 UHS-I V30 180MBps 90MBps 128GB = 27sgd
SandDisk Extreme U3 UHS-I V30 180MBps 130MBps 256GB = ?sgd
SandDisk Extreme Pro U3 UHS-I V30 170MBps 90MBps 64GB = 15sgd
SandDisk Extreme Pro U3 UHS-I V30 200MBps 90MBps 64GB = 18sgd-19.5
SandDisk Extreme Pro U3 UHS-I V30 200MBps 90MBps 128GB = 32sgd-35
SandDisk Extreme Pro U3 UHS-I V30 200MBps 140MBps 256GB = 55sgd-72
SandDisk Extreme Pro U3 UHS-I V30 200MBps 140MBps 512GB = 125sgd-139
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Sandisk Extreme Pro SDXC, UHS-II, 64GB ? 280MBps 250MBps 64GB
Sony E 64GB UHS-II V30 270MBps 70MBps 64GB=25sgd
Sony E 128GB UHS-II V60 270MBps 100MBps 128GB=60sgd
Sony M 64GB UHS-II V60 277MBps 150MBps 64GB=35sgd
Sony M 128GB UHS-II V60 277MBps 150MBps 128GB=92sgd
Sony M 64GB UHS-II Tough V60 277MBps 150MBps 64GB=63sgd
Sony M 128GB UHS-II Tough V60 277MBps 150MBps 128GB=99sgd
Sony G 64GB UHS-II Tough (for 8K) V90 300MBps 299MBps 64GB=138sgd
Sony CFexpress 128GB tough ? 1700MBps 1480 MBps 128GB=306sgd
  1. Minimum video recording performance: how fast it can steadily record video
    • category label based on Minimum write speed (MB/s) and its corresponding Bus Mode (old to new):
      • Class 2,4 (2-4MB/s): Normal speed Bus (DVD resolution recording)
      • Class 6 (6MB/s ): Normal speed Bus (HD-FHD resolution recording)
      • Class 10 (10MB/s ): High Speed Bus (High Quality HD-FHD resolution recording)
      • UHS 1 (10MB/s) : UHS-I Bus (High Quality HD-FHD resolution recording)
      • UHS 3 (30MB/s) : UHS-I/II Bus (4K resolution recording)
      • V30 (30MB/s) : UHS-I/II Bus (4K resolution recording)
      • V60 (60MB/s) : ? Bus (6K? resolution recording)
      • V90 (90MB/s) : ? Bus (8K? resolution recording)
    • category label based on its Bus Mode:
      • Normal Speed bus: 12.5MB/s
      • High Speed bus: 25 MB/s
      • UHS-I bus: 50MB/s - 100MB/s
      • UHS-II bus: 150MB/s - 300MB/s
  • photowiki/card.txt
  • Last modified: 2023/10/09 15:36
  • by ying