Where are "Downloadable" files stored?

Does anyone know where the “Downloadable” files are put when uploaded onto the server?

Suddenly my files are showing as invalid once downloaded and I need to check the permissions. I just moved the cart to a new server and think the problem might be that the permissions changed. But I can’t find the folder to check!

Should be /var/downloads

Or if you are referring to product “attachments”, then it would be /var/attachments

Thanks, Struck. I’m still a bit muddled as to where to find things in this cart.