You want to make sure you are ripping to avi DIVX or XVID. If you've already got the files ripped, the key is to make sure the encoding is set to DIVX. That's all I had to do. Here's a link to where i figured it out. Switching the format with the little program at the link takes less that a couple of seconds. You also need to make sure you're using a FAT32 formatted USB drive (which is the format they usually come in). I've got a 32gb loaded with all of the kids shows and it's flawless.