I have a tablet LG V500 and after the upgrade to Android v4.4.2 also can not manage my files and folders on the external card via WiFi. I'm doing it just over a USB cable using the explorer in W8.1 Pro.
And if you need to make more adjustments, so I have to remove the tablet from the micro SD card inserted into the card reader and USB cable back to the PC. I still hope that it is not the intention of Google and soon released a fix.
And if you need to make more adjustments, so I have to remove the tablet from the micro SD card inserted into the card reader and USB cable back to the PC. I still hope that it is not the intention of Google and soon released a fix.