trouble with factory reset

shants11

This is an Acer Iconia Tab A200.  I plug in a usb keyboard and boot into Android system recovery utility.  I select "wipe data/factory reset" and all it does is wipe the data and doesn't restore it to factory.  On reboot I keep getting the message, "Encryption unusccessful...bla bla bla"

 

From the recovery utility, if I select "apply update from external storage" I get the error: 

E: unknown volume for path [/sdcard]

E: error opening /sdcard: No such file or directory

E: unknown volume for path [/sdcard]

 

 

When I pull the microSD card out and plug it into my desktop computer everything looks fine.  It's got all the original files on it and it's formatted with fat32. 

 

Tommy-Acer

I'm hoping that the following technical articles which discuss these items are of some assistance.

 

How do I reset the hardware and software to factory defaults on my Android tablet?

 

How do I perform updates to the Android Operating System on my Android tablet?