Formatting a CF card to work with the series 5, 5MX, MC218, 7 and netbook can be tricky. They use an older FAT16 file system and are fussy about how it is set up.
With a Little help from Mini Tools Partition Wizard (other disk utilities are available) we can easily get cards working.
Want more storage? Just partition a larger card and get upto 4X the storage!!!!
https://www.minitool.com