Hello,
After spending a few days looking at the forum and trying to make things work (without success) i’m now asking for some help 
I want to use the open log board https://learn.sparkfun.com/tutorials/qwiic-openlog-hookup-guide/all with my explorer board.
this logging board exists in 2 versions (one over serial and it works like a charm), the other one over I2C (the one i tend to use because i need the hardware serial )
the library is https://github.com/sparkfun/SparkFun_Qwiic_OpenLog_Arduino_Library/archive/master.zip
I’ve been using the Wire Library with other devices without problem.
What i’m facing is that not all caracters are written to the SD card, and sometimes new lines are not taken into account
format : h, m, (should be format : h, m, s,Temp)
0,0,0,27.72
0,0,6,27.77
0,0,12,27.70
0,0,18,27.70
0,0,25,27.73
0,0,31,27.73
0,0,37,27.80
0,0,43,27.73
0,0,50,27.600,0,56,27.76 >> new line not taken into acount
0,1,2,27.62
0,1,8,27.73
0,1,15,27.71
0,1,21,27.73
Edit : I have tested the Open Log board on I2C with an arduino UNO and it works like a charm ;-(