Just discovered something that is worth a comment or two:
go to JW.org and type in the search box 'data protection'. I had a conversation with an elder who told me that they are directed to purge some files pertaining to people who are ex-JWs and have been disfellowshipped over a prescribed number of years
. This was news to me and he mentioned the data protection policy online.
edited to add the following link
https://www.jw.org/en/privacy-policy/global-policy-personal-data/
Which contains information which seems to contradict the elder's statement.