I have a friend that was using Mac Mail with POP and has hundreds of "On My Mac" folders. She has multiple devices and can't see these folders as they are all stored on only one of her devices.
I created a Gsuite account for her and now want to import all these folders to labels in Gmail containing all the emails in them.
I see options for paid software that converts Mbox exports to PST, and then use the Google PST migration tool on a Windows computer. Is this the best method that will keep all the folders/labels? Is there a better method?