I've been uploading photos onto my 622, (1 folder at a time + renaming the folder on the 622), when I got a device full error message. So, I archived several movies onto my external harddrive and deleted some shows too; but the upload of my photos still showed device full. It seems that there is a rather small (perhaps 4 - 8 GB) photo storage limit? Also, it seems that photos cannot be transfered onto an external harddrive.