Most users of the android version of this software use devices with 32 gigs or less internal memory. As a result, your userbase is shrinking after Android Kitkat standardized the external sdcard storage space, adding security protocols.
These include:
*Applications can only read/write/execute to/from folders on an external sd card if they own those folders
*Direct writing from PC to External SDcard using the phone as a medium does not work.
Kitkat has been out a while now, and this issue remains unsolved.