ESX 6.7 VM not starting up after vmdk move

Solution 1:

the .vmx files contains paths to the .vmdk files. they need to be correct for the VM to run. Additionally, it looks like you had a snapshot on the VM, which splits the .vmdk in multiple files. You could try to move the rest of the VM to the other datastore, and the paths should be correct again (you might to unregister and reregister the VM). If that doesn't work you might need to revert all your changes, or restore the backups of your VM.

Regarding the larger file size: Your .vmdk was Thin provisioned, that was lost during the move of the file, so now it occupies the size of the whole virtual disk.