Migration to new server - restoredata

Migration to new server - restoredata

I am trying to migrate to a new server and understand this should be possible by using restoredata

However the backup now comes in 2 parts and I do not know which file, part1 or part2 to use, or do I need to do both?
It also asks if this is a production build, what effect does answering yes or no have?

Also this is now a restore of a mysql backup to a postgres database, will this work?

Nick
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