I have an Advent TegraNote-P1640 tablet running Android 4.4.2. I have added a 32 GB sd card, but am having problems copying data. With the tablet connected to my PC, I can copy a file from the PC to a folder on internal storage (0), and to a folder on sdcard1 OK. I can also copy or move files between the folders using the PC. However, using ES File Explorer on the tablet, I can only copy/move in one direction, from sdcard1 to (0), trying to copy or move a file from (0) to the sdcard1 always fails. I'm very new to Android, although familiar with windows and unix OS's.