Thanks. Which one do you leave in, the FAT32? I originally formatted mine to NTFS because I read somewhere that in order to have OneDrive moved to the SD card that it would have to be formatted to NTFS. But I guess for now OneDrive cannot be moved.
I might also add, adding 2 partitions (one exFAT, and one NTFS), so you can make FileHistory backups on the one, and use the other doesn't work. Apparently, only the first partition is "seen" on the SP4 - no matter what the formatting.