u/Weekly_Access_9192

Hi I have 16 gb 1 tb konkr pocket fit G3 gen 3. I received it March and it has been working fine apart from flickering RGB lights now and again and a couple of times turning itself off. However I was transferring files from my konkr to my SD card and the device turned itself off. After turning it back on it no longer recognised my SD card. I have tried restarting it several times, taking out and wiping the SD card and also putting in a known working SD card but nothing shows on my device. Has anybody had this problem? Is there a fix? I would be grateful for any advice.