I recently bought this particular SD Card from Amazon:
I get some very weird and super slow writes, as around 100KB/s writes, and depending on whether or not I have done a write, I get speeds from 20MB/s to as low as 500KB/s. I was looking up as to why, and discovered about implementation details that may explain the performance issues, such as erasure and how pages are pooled together, but honestly I have some extreme doubts here.
Rasberry Pi Imager (RPI) fails its verification after finishing but BalenaEtcher fails immediately and I’m not sure whether that is because it tries to read back after writing blocks of data to the SD Card. I’m wondering if I can safely just say that this SD Card is essentially DoA or even fraudulent, despite it being shipped from Amazon LLC and sold by SanDisk themselves…
Mind the pixelated image; had to use Peek, but then had to use an online GIF editor since it pops up my real name in the permissions menu when asking for root access.