Forcefully?
Also preferably yes, use fat32 - because no one will help you when you managed to corrupt your filesystem, which happens when writes to the sdcard are interrupted, and fat32 turned out to be more resilient to that. Although your call.
If you copied the folder over from a Mac, thats basically the cause of the issue In which case use an option in hekate to fix the archive bit of the /switch folder (includes subfolders).
If you dont use hekate, and are one of the SX OS morons (sorry, not lovingly), either use a Windows PC, or create the folder using an FTP client, before copying over the files, or hang yourself while trying to follow this thread:
https://gbatemp.net/threads/how-to-fix-archive-bit-for-all-sd-files-and-folders.515258/ (You dont want to execute the command for the Nintendo folder - pay attention to that.)
If you didnt copy over your rom folder from a Mac OS machine - something odd is going on (special characrters in the foldername?). As in - you have to figure it out yourself. It isnt related to fat32 or exfat though.