...
Registered users can create projects and wikis. They can collaborate with other registered users and create Synapse teams. Registered users can also download publicly available data and, if they fulfill project-specific Conditions for Use, they can also access controlled data.
...
Become a validated user
In your Synapse your Synapse profile, click your name/picture on upper banner of the screen, then select Settings. Use the links in the Profile Validation box to:
...
*Your ability to download a file or table depends on your Synapse user type, local sharing settings, AND fulfilling the conditions the conditions for use, if any, of the file or table.
...