Let's try this and see what happens:
Connect the scanner to your computer with the USB cable. Hit "E/yes" for mass storage. (Hopefully you'll hear something from your computer speakers indicating a connection was made.) It will be where all the hard drives show up.
Then using your Windows Explorer, see if you have a Removable Drive show up, with a capacity similiar to that of the micro SD card in your computer.
Unplug the USB cable and see if that drive disappears. If the drive disappears, that confirms there is a good connection between your computer and scanner with the USB cable.
If you do not see that Removable Drive, that suggests there may be a problem between your computer and scanner, possibly a bad USB cable. Other potential issues are a bad driver for the USB port.
There is another way of programming your scanner's SD card. If you have the ability to plug the micro SD card directly into your computer, most newer computers have HD card slots, just plug the scanner's card in there.
You may need an adapter card for HD to micro SD card. If your computer does not have card slots, you can get a card reader from places like Best Buy.
(I've found that programming my SD card with it being in my card reader hastens the process of writing programming and updating the master database).