01-19-2017, 08:43 AM
(03-31-2016, 09:47 AM)Andrew2 Wrote:(03-31-2016, 08:57 AM)codetheweb Wrote: The SD card I'm using was bought new from Best Buy...
Counterfeit cards get into the supply chain pretty early somewhere in Asia so you get them from any retailer worldwide. Checking control samples doesn't work either since a retailer doesn't get a batch of 1000 counterfeit cards but maybe 50 out of 1000 are fake. Therefore always test directly after purchase. It's worth the time. And in case you use an USB card reader to later burn images on use this for the test also since sometimes it's the reader that corrupts data and the card itself is fine)
If you're on Windows I would prefer H2testw for the following reason: H2testw always shows actual transfer speeds while f3 only reports average speeds at the end. And it's pretty funny to watch SD cards or pen drives starting to throttle after a few minutes due to overheating.
How can I test on Mac. I am having issues too.
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