DAX Duration Measure in Days, Hours, Minutes, Seconds
Credit where credit is due. This is an enhancement of the technique originally posted here by @konstantinos and @smoupre.
A client needed a duration expressed in this format: 2 days, 05:03:52
In other words, Whenever the duration exceeds 86,400 seconds, express that portion in days, then build the remainder in hh:mm:ss format.