To gain access, you cannot use the standard MPtool. You need:
USB 3.2 Gen 1 SuperSpeed (5 Gbps), backward compatible with USB 2.0. sm3265ac exclusive
Because the controller uses "Dual Channel" pseudo-SLC caching, when the NAND starts to degrade, the controller often goes into a boot loop. While the SMI tools are great for reformatting , they are terrible for data recovery . To gain access, you cannot use the standard MPtool