SugarSync is a free service that enables you to access, sync and share your files across all your computers and devices.
Get your files from Sugarsync to Podio by clicking somewhere to add files in Podio. Either the "Add files" button on items, the paperclip on statuses or the "Attach files" on tasks.
Then click "Add file service" in the dialogue that follows (see screenshot).
Click the Sugarsync logo (it's a hummingbird-ish green one) and connect to Sugarsync by typing in your username and password.
Now you can browse and link to your files from Sugarsync to Podio!