moe76 In any upgrade taking a backup is key, but in this situation your old server acts as a backup - just don't delete it until everything is ready.
- Copy the database over to the new server. Ensure you set up the same accounts on the new SQL server so that the old config still works.
- Upload the files from 1.17.4 to the new server, including updated versions of any plugins you're using (if you use the attachments on the filesystem plugin, remember to copy this folder across too).
- Copy the ostconfig.php file from the old server to the new one.
- Log in to the /scp portal on the new server. You should be prompted to upgrade the database.
If in doubt, you can always replace step 2 with copying the files from your old server, then overwriting them with the upload from 1.17.4.
