Hello,  Is there a WIM within the WIM and if so that will not get split.
I have captured Win10_1703 using imageassist, about 16GB. Because using UEFI, so my PE disk is FAT32. i need this .wim file split into .swm. but when i split it, there will be a split 4.7GB. the same result when i use imagex to split. Does anyone encounter the same issue, any suggestions? 
Win10_1703 image split