Podcast Upload Trouble

Hi, about a year ago I initially hired someone to set up my website. I use Backpack Traveler theme. The person I had hired imported all of my podcast episodes onto my site. Now, I run my site independently but I am having trouble uploading this season’s episodes because it keeps telling me there is a limit of 8MB upload. This seems strange because that is such a small number and my previous episodes are way beyond this. I’ve tried uploading the files directly into wp/content but that doesn’t seem to work either. Am I missing something on this? How can I upload my episodes to my site? Thanks!