No issues...I will try to explain...

We have several teams...One of them produces a jar file whose logic is black box to us. We only use it. We are not aware of its contents. It is a carry forward from old legacy code.

To use the jar file, we copy it to the drive so that our code can reference the classes inside the jar file. To do that we copy the jar file to the path where databricks copies all the jars - you can see it some environmental variable - I do not remember...