Quote:
Originally Posted by BloodRagg
U3 says nothing about the cards application performance which is what you need.Its nice to copy books with good speed, but how often is this relevant ?
Newer cards come with A1 and A2 labels, this is an indication for application performance.
IIRC A1 is 500/1500 IOPS and A2 2000/4000 IOPS. This is what makes your e-Reader fly.
OS's and Applictions have small random read/writes 4k/8k/16k, the faster they are read/written the more performance you experience.
You can have all the speed in the world but you only notice performance if the current configuration is under-performing. If the software requires 600 IOPS but the card maxes out at 300, you will notice that performance pretty quick. That also means that anything over 600 is wasted money. Keep in mind though that if the software changes, like the update from 3.x to 4.x, the IOPS requirement may also change.
So Id rather overpay a bit to be on the safe side.
So how about benchmarking the cards in the Kobo e-reader and posting the results ? 
(benchmarking in other devices doesnt mean anything, if found that out the hard way)
https://liliputing.com/2018/10/sandi...k-2k-iops.html |
If you have understanding on the subject and didnt just do a quick google for "best sd card", and also read the thread which would be a requirement to be a part of the discussion, you would have noticed that iops have been mentioned.