If you want to use a Swap file, it's better and easier to set it at: TOOLS > CONTROL PANEL > MEMORY > VIRTUAL > and tick Add Virtual Memory The maximum size of it is 64MB, no matter how much free space you've got on your VFAT partition. (Because virtual memory added this way CAN ONLY BE SET at the VFAT partition as a SWAP FILE). The advantages of doing so is that you'll be able to access via Windows and USB your VFAT partition. There you'll find the Swap file of 64MB.