Like in the screenshot above, this is only visible in the disk browser at the time you’re loading in samples. Perhaps in a same session you can still remember where you got them from, if not too much time has gone by.
Renoise stores the samples used in a song inside the songfile when saved, not the locations where you grabbed them from. So if you have a large sample collection, after a while it will be hard to remember.
In that case Sononym; https://www.sononym.net/ together with the Renoise (wip)tool Sononymph; https://forum.renoise.com/t/new-tool-3-1-sononym-integration-preview/ can help finding back the original sample / path when searching for similarity?
(Or perhaps you can persuade someone to create a keyboard shortcut script that is able to load a sample from the disk browser and saves the origin path inside the name? 
)