Chances are the problem may be in sys.txt:
Either the folder name is incorrect, or the path(s) do not include the exact name of your storage location according to your specific device and ROM. If you don't know what the exact name is to add to the path line, check with an explorer like Total Commander or similar that shows true paths.[folders]
data_folder_name="iGO_World"
linked_root_list="/storage/emulated/0 /storage/MicroSD /extsd /storage/extsd0 /mnt/extsd0 /mnt/storage/extsd0 /external_sd0/mnt/sdcard/external_sd0 /mnt/external_sd0 /mnt/sdcard/external_sd /sdcard2 /sdcard /sdcard/sd /mnt/sdcard /mnt/sd /mnt /storage /mnt/extSdCard /mnt/external_sd /mnt/sdcard/external_sd /sdcard/external_sd /storage/extSdCard"
Where an APK file is located while installing it makes no difference at all, and once installed can be deleted from wherever it is.
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