Technology
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Aren't SD cards slow and prone to failures?
The ones used for 4K recordings are not slow 100+MBps, I won't say prone to failure as such, flash storage can only handle a finite number of writes but we can mitigate that by using wear leveling.
That's pretty slow for terabyte sized storage. And slow compared to the alternatives, too (600 MB/s or Gabs/s).
Spinning hard disks are faster than this, too. Have been for decade(s).
I wish SD Cards also had some specifications for random access speed.
I used to have a UHS-I SanDisk card which felt much faster than my current UHS-III Samsung card. It's really evident when searching through the storage, waiting for photo thumbnails to cache, etc..
I am not sure whether to go for a UHS-I SanDisk or UHS-III Samsung next. That SanDisk might not handle higher bitrate 4K.
Hehe, I think I haven't caught up with the improvements, flash with 1GB/s transfer speed is ludicrously fast!
All SSD and NVMe are also "just flash", and reach 5GB/s and more, often limited by the available interface bandwidth until very recently.
Other formats can exceed that by caching & writing to multiple chips at once i guess.