While there is no limit to the quantity of files received by ProQuest for an individual submission, there is an 8GB single file size limit. If you have a single files that is for example 20GB, you need to break that up into files that are 8GB or less (such as 7GB+7GB+4GB). Any file larger than 8GB would not make it to the ProQuest platform, so they have to be broken up into files that are 8GB or less.