I’m having the same issues with the Lenovo Tab 4 8 Plus version . The tablet had the same problem once before, but the Power button hard reset worked that time. The tablet booted up just fine. Halleluiah, I said to myself and first thing I did ...
Using Sandisk 64 gb class 6 since december 12 without any problems even with 40 gb of data approx(after destroying two class 10 ones). Thank you
Sent from my GT-P6200 using xda premium