Let me just clarify, so you are not booting from said SD card?
The SD Card is 64GB, does it have existing partitions on it?
All the searches for stuff like this should be scoped to the Debian operating system (as it concerns the BBB, and the module). Can you say what the target partition sizes are?
I don’t know if is the same with the beaglebone debian image, but with the raspberry pi jessie release of raspbian, the OS automatically increases the file system to fill the entire SD on the first boot.
I can boot from the SDCard when used as Win32DiskImager creates it.
The partition is the size of the image file (I forget the exact size it was)
but 99% of the card is unused.
I wanted to use the unused space for data storage.
I am not sure what is needed for the target partition sizes (That was for a later project).
This is not a problem for me because I was just trying out several methods to expand the partitions.
None I tried seemed to work. Just playing around for now.