why my andorid stuck in booloop after install new ROM?

A

AC Question

I did the update ROM / flashing the ROM on my android , lenovo S850 , and it did not work , then it makes my android in recovery mode and continue to boot loop , I tried to reboot but could not . please help me , what should I do in order not to omit important data such as images and others ?
in recovery mode there are several options to reboot , wipe user data, and factory reset
 

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