Are Xoom files automatically transferred to a newly added microSD card? I just slipped a 32G microSD card into my Xoom tablet. I had used the SD card in my Android smartphone before replacing that card with a larger capacity card. Are files that were heretofore stored on the Xoom automatically moved to the SD card? 

I may have neglected to remove all files from the sd card before installing it... so I should be able to delete all files showing up in the /sdcard (sdcard) directory? I note I also have a folder named /mnt/external1 (sdcard) directory. Any idea what is what here?
The files on the SD card are most likely there from the previous handset.  Android won't automatically move any files when it detects a new sd card.