can't copy iPhone 6s back up on macintosh hd error -54
hi
when i do back up my iPhone 6s I have the "can't copy on Macintosh HD unknown error -54"...
I've got 60 free GB on Mac and my iPhone 6s 64gb has 25 free GB's yet
at the end it seems the back is complete but i always get the aforementioned error message...
what can it be?
thanks
iMac