pub/ pub/OpenBSD <----- You may want to start here. pub/OpenBSD/7.5 <----- Most recent release of OpenBSD pub/OpenBSD/snapshots <----- Most recent snapshots (current) archive <----- Snapshot Archive (for troubleshooting)
Replication from the master install file repository is every two hours.sevenfive OpenBSD 7.5 release sevenfour OpenBSD 7.4 release seventhree OpenBSD 7.3 release snapshots OpenBSD snapshots openbsd top of current pub/OpenBSD, with releases and snapshots