rs170a wrote on 1/28/2015, 10:16 PM
BUP files are a part of the DVD structure (along with IFO and VOB files) and shouldn't be deleted.

PeterDuke wrote on 1/28/2015, 10:33 PM
They are accessed by the player if for some reason the main files are corrupt. Delete them and take the consequences.
Kit wrote on 1/28/2015, 11:17 PM
Thank you both for the replies. I'll leave them as they are.