You can create up to 3 links (to folders or files) on your free Sync Starter plan.
Viewing your links:
You can view all of your links from the web panel Link dashboard, by clicking here:
Removing links:
You can get around the link limit by removing some of your existing links (to bring your total below 3). You'll then be able to create new links.
Here's how to remove a link:
/hc/en-us/articles/38275626752531-How-to-manage-shared-link-permissions/#linkdelete
Get unlimited links!
You can also upgrade your Sync account to the Solo or Teams plans, which include unlimited links, as well as additional privacy and access control options for your links, document previews, and upload enabled links (file requests). Upgrades are instant, and start at $96 per year for 2 TB of storage space, unlimited links with advanced link access controls.
View your upgrade options here: