What supplier would you recommend? WD and Sandisk have been my go-to for all things storage, but I prefer to pay a premium up to 20% for better quality.
My experience with WD spinning disks has been great. I've had two Sandisk SD cards fail which was a bummer but they both went into a read-only mode so I didn't lose any photos. I've switched to Samsung's high-endurance line for those.