I can't find the way to do this, but am very surprised if you can't.
I'm using the "get file" function to back up some settings in an XML file to the Agent's file stash on the Kaseya server. I want to write a second procedure to copy the settings file back to the agent and then use it to restore the settings. I can't work out how to do this from the Agent's files rather than the VSA Shared Files.
I did find some very old posts saying to prepend the file path with ..\..\UserProfiles but this was removed a while ago for security reasons (and rightly so!)
Do you have a Kaseya Agent on your VSA? You could possibly use the "writeFileFromAgent" function instead of "writeFile"
source agent: [your-VSA-server]
source path (get-file location of your target agent): C:\Kaseya\UserProfiles\#vMachine.agentGuid#\GetFiles\Your.XML
source path (Docs location on your target agent): C:\Kaseya\UserProfiles\#vMachine.agentGuid#\Docs\Your.XML
target path: [your target path]