How to move offline maps to SD card
@Eddy Ito -- I used 'Storage Check' app to 'move' my maps to the SD card. This app has been replaced by Storage Sense, which unfortunately does not have the moving maps to SD card feature.
See here for details: http://www.windowscentral.com/how-move-offline-map-data-your-sd-card-windows-phone.
Notes:
- Storage Check does not show up in the Store. Use the download link given in the above article to install it.
- You need to delete your existing maps on the phone, and then download them again after switching their location to the SD card.
Biting the hand that feeds IT
