I'm on Linux. I have an SD card which has been giving me a number of strange problems for a while now. It now appears to have wiped itself completely. Looking in GNOME disks the main partition, which I expect to be exfat, is of type "unknown". If I run fsck.exfat, It claims it's not a valid exfat image.

Windows refuses to even look at it.

Before I destructively image the disk, do you think there is ANYTHING else I can/should try to see if the data is still easily recoverable?