How to pass build artifact into another job in Jenkins

There is just one workspace per project/job in Jenkins. The directories of builds contain just information about the builds and their results.

The root directories of both are specified in Manage Jenkins → Configure System → Advanced....

To deploy an artifact of a previous build you have to copy it to somewhere else in build master and access it there from deploy master later.

UPDATE:

See the inline help for Which build → Parameter Name:

A parameter with this name should be added in the build parameters section above. There is a special parameter type for choosing the build selector.

Use this Build selector for Copy Artifact instead of a String Parameter.

Add following in downstream project. "Build selector for Copy Artifact" instead of a "String Parameter"

Copy artifacts from another project

Thats it. Click "Build with Parameters" and pass build number