That sucks though, I bought the expensive 512GB flash drive just for recalbox...
Before you're sure the problem is with the hardware, make sure the problem isn't just a corrupt file.
Watch this video (enable subtitles):
https://www.youtube.com/watch?v=skeULeTu7p8&list=PL2oNQ0AT7fx2ExiSNrfHUzga5GnogI4sh&index=26&ab_channel=Recalbox
Backup the folders mentioned in the video, format your storage device in exfat, and try again.