exfat-utils

Read this post at Jolla Together and decided to compile exfat-utils which provide

• exfatfsck or fsck.exfat
• mkexfatfs or mkfs.exfat

commands.

If you want exFAT support download fuse-exfat package from my repo. 

• Make exFAT filesystem on your SD card:
  ​​mkexfatfs /dev/mmcblk1p1

• Label SD card:​
  exfatlabel /dev/mmcblk1p1 "label"

If SD card doesn't mount automatically you need create a label.