How to Obtain Slack Data for eDiscovery and Investigations
Can my boss read my Slack messages?
Preserving, Collecting and Exporting Slack Data for Discovery
How do you export a private channel on Slack (e.g. a personal private channel)?
It was the first app to introduce a new way of working through digital messaging in real-time.
If you have any other questions, I am here to answer! The caveat being you will lose the original timestamp and these will all appear timestamped in real-time.
I recommend using Chrome for this as the instructions seem to match this browser most closely at least more so than Firefox.