Attachments uploaded by performer and not linked to DoR, are they purged or not ?

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Hello,

As per the "Using Global HR" guide, I understand that Document Records and Attachments linked to Document Types / DoR are never archived nor purged.

Here's my use case :

I have a checklist task where the performer has to upload a document, but I did not set any Document Type so the attachments will not flow to DoR of the performer, but only accessible and downloadable by the HR onto the task itself, am I correct ?

And in this case, if this checklist is purged in the future, will the attachments here also be purged or not ? And if not purged, where could I retrieve the document then ?