I exported several Confluence Spaces from NextGen (Cloud based) version. There are two spaces of interest. The export produced two .ZIP files of 12GB and 23GB.
I have been trying to import at least one of the files using the HTML importer, to no avail. That was done by extracting the -HTML.zip file from the larger zip file. I had tried importing the raw ZIP file and/or individual HMTL.zip or XML.zip internal files and still fails or simply do not complete.
What is the best way I can use to recover my spaces?