You should install the NEXUS MEDIA IMPORTER from Playstore. After that you save your data to an USB-stick at your Windows PC. Then you connect this stick with your NEXUS and now you can copy the data from the stick to the SD Folder on your NEXUS.

Another way is use to use Bluetooth for transferring the files.

Thanks but WiFi almost unusable in rural village. Download speeds sometimes 0.2Mb/sec! and none on airfield.

If you have Wifi , then easyist option is to save to cloud, then download from the cloud

How do I transfer routes (file) and aircraft data from laptop (Win8) to Nexus 7 2013? I have tried a linking cable and also tried using a micro SD card to no avail