I have an encrypted installation of OpenBSD 7.9 i386 on a hard drive. This is on a computer with no internet connection, completely offline. Is there a way to upgrade to 8.0 using a USB drive? If so, how?
The answer is probably an interactive upgrade, with bsd.rd and the sets downloaded to your USB stick: https://www.openbsd.org/faq/upgrade80.html#InteractiveUpgrade
