[AC Question]

I have AudioSonic TL-3470K tablet that has a problem of showing 0.00b of internal storage and being reset to factory settings every time it reboots. after the first time the problem showed it self the tablet stopped booting, it just stood stuck at boot logo. I located the firmware and made it bootable on external SD card and got it to boot again, but the initial problem remained. I was only able to find one firmware that is a match to the motherboard and processor in my tablet, I also tried many solutions I found online to solve that problem and still no luck. Is there something that i could do or some other firmware that might work? The processor is aml8726-mx and motherboard is cb-m ru 94v-0