Create variable directory and incremetal files

Other Hardware Storage
5 
char monthNames[] = {"", "Jan", "Feb", "Mar", "Apr"}; the compiler says:

should have been:

char *monthNames[] = {"", "Jan", "Feb", "Mar", "Apr"}; the compiler says:

and for: SD.mkdir((const char )dirName); error: invalid conversion from 'const char' to 'char*'

Then, the cast is not necessary.

SD.mkdir(dirName);