I try yours dont work..I found this on another site, have not tried it yet still waiting for my replacement.You must be rooted.
As always you use these suggestions at your own risk,
1/ Now that you now have root access you can edit the vold.fstab file. In the Root Explorer app Go to /system/etc/vold.fstab
Once you've found that file simply long press it (hold down on it) until you see "Open With" and then choose "text editor"
2/ You should see a text file. In the 2nd paragraph you'll see two lines that say:
dev mount sdcard /mnt/sdcard auto
dev mount extsd /mnt/extsd auto
3/ Highlight them and edit the lines to read:
dev mount sdcard /mnt/extsd auto
dev mount extsd /mnt/sdcard auto
4. Save and Reboot!
Press the menu button or tap menu and then select "Save and Exit".
(It should save the original file for you as a backup automatically when you save in case you screw anything up)
Turn off the tablet, make sure your external micro sd card is in the external sd slot and then reboot. (You need to reboot for the changes to the vold.fstab file to take effect)