S5 - file from SD to main device

[AC Question]

Hi all,

I have Oziexplorer on the main device with the required OZF files on the SD card.

Firstly the program won't read the SD card for the maps, so I'm trying to shift the map files to the main device. I've tried with the phone connected to my PC but get a message '(Galaxy S5) is busy'.

I can't locate them by the device itself to even begin transferring them (yes they are present).

Any idea's?

Thanks.