Cookie Jar
Set-Cookie responses are stored automatically and replayed on later requests to matching domains — no manual copying of session cookies between requests.
Volley keeps a server-side cookie jar at data/_volley/cookies.json. Whenever a response includes Set-Cookie headers, the cookies are parsed and stored automatically; on later requests, any stored cookie whose domain, path, expiry, and Secure flag match the request URL is sent back in the Cookie header.
Click Cookies in the topbar to open the cookie jar modal, where you can see every stored cookie's name, value, domain/path, and expiry, delete individual cookies, or clear the jar entirely.
Any cookie that would be attached to the current request also shows up as a read-only Cookie row in the Headers tab's "Auto-generated" section — see Request Editing — so you can see exactly what will be sent.