Active Level 3
I have Samsung j7nxt device since 2 year 
& it' running smoothly  but after software update android pie it's has been notice there is something bug in software.
 my device getting started error message & some software issues are arise.
 so I found out which software is affecting my device but no results are found
 so I went through hard reset of my device for 3 time & sd card also formatted after that my problem is resolved successfully. 

So I suggest every J7NXT users go for hard reset of your device problem successfully resolved