You can kinda prepare for an easier move by doing the following:
- note down the currently assigned drive letter for all hard drives which store media. Maybe add the letter into the name of the storage volume.
- save a backup of the Plex server registry branch. https://support.plex.tv/articles/201539237-backing-up-plex-media-server-data/
- if you can, move the storage location of the Plex data folder onto a dedicated SSD or hard drive. [HowTo] An extended guide on how to move the Plex data folder on Windows
By separating it from the system boot drive, it’s going to be easier to perform the move.
Once the new machine has arrived and has its operating system installed, you then simply take all the drives and SSDs out of the old machine and pop them into the new machine.
All that then needs to be done is to
- assign each drive the drive letter it had on the old machine.
- import the registry backup