You can write to the file system of the grid nodes from your test plans. You should use the absolute path
/data/flood/results/ when writing to the file system if you want to be able to access these files as archives after the flood test is complete.
The file system of each grid node is archived and stored for 30 days. At the completion of the flood, you may see an Archiving status for the time it takes to individually compress and sync copies of these archives to Tricentis Flood.
You will then be able to download these compressed archives at your leisure.
Simply use the Archived Results menu item for your flood.