I have a mosaic dataset which I want to upload to ArcGIS Online. I have been reading up on how to do it and the online tutorials say to Create a Map tile package. I also read if dealing with a large mosaic dataset to check Create Multiple Packages. Mines over 1 TB so I checked it. Now I see it output 59 different packages. I am currently bringing each package into my ArcGIS Pro document to see which ones I need to cover my whole parish.
My question is How do I mosaic multiple packages into one file so I can upload it to my ArcGIS Online account?