...

• Workspace mode: all users share the same storage credentials and locations for managing their workspace assets. No further configuration is required.
• User mode: if the workspace has been configured to rely on user-specific storage configuration, additional configuration may be required. For more information, see AWS Settings Page. 

Assign roles

When the account is created, it is automatically assigned the Default role. You should review the permissions associated with this role and to determine if the user needs to be assigned a different one. For more information, see Roles Page.

...