There are two essential ways to migrate a large amount of data “quickly”:
- Migrate data until the data window closes. The next time the window opens, pick up where the migration left off.
- Migrate data until the data window closes. The next time the window opens, start at the beginning again and check for changes.
There are pros and cons to both methods. It’s tempting to think the first method would be the fastest/best, since getting a “baseline” copy of all the data would be done first. The data set would then just have to go through some sync copies, and then you can change over to the new destination.