To import from Mendeley or Zotero, simply click the Import references button, then choose From other reference managers, then choose either the Mendeley or Zotero option:
You'll then be asked to enter your login details and we'll connect to your Mendeley/Zotero account to import folders, references and attached PDFs. You’ll also see an option to maintain your folder structure, choose which folders to import, or import everything to a single project. If you maintain the folder structure, any folders and subfolders become projects and subprojects in Workspace. Please note that we only cater for one level of subproject, so any sub>subfolders in Mendeley/Zotero will be imported as separate subprojects in Workspace.