256GB microsd

[tvcool]

Hi,
I’ve used 256GB microsd with B1W camera and after 2 weeks of usage it started saying that there is file system error.
Formatting the microsd using app doesn’t resolve the issue.
Writing files to the microsd using laptop succeeds without any problem.
What could be wrong?

 

[CaptureYourAction]

Try formatting it with SDFormatter. Perform the full overwrite.

SD Memory Card Formatter for Windows/Mac | SD Association

www.sdcard.org

 

[kamkar]

It is a sad fact that memory cards can die very sudden and very fast, my personal record are old, when 64 GB card was big and expensive.
Almost 2 cards within a month or 2 died on me, and almost before i got th fill the cards up just 1 time.
Of course both was replaced.

 

[tvcool]

Surprisingly full formatting saved it. Thanks!!

 

[kamkar]

I had a 256 GB card not working for me (adata endurance ) it was brand new, testing it, the speeds was far from what they was supposed to be.
Ran it over with sdformatter and that restored the read / write speeds to what they was supposed to be.
Though that card i have tested in many cameras and only found it to be working in 1 dashcam, but it work fine on my action cameras that hit the card much harder with high bitrate 4K/60 FPS footage.

 

[tvcool]

It has stopped working again..
I've noticed that Sandisk don't write anywhere what is the write speed.

"256GB-512GB; 1TB: Up to 150MB/s** read speed; write speed lower" what doesn't mean lower ?! Any speed is basically lower

https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/sandisk/product/memory-cards/ultra-uhs-i-microsd/data-sheet-ultra-uhs-i-microsd-150mbps.pdf

Do you have any idea what can I claim to replace it by warranty?