Technically, it has never been a problem to format USB drives with a storage capacity of more than 32GB with the FAT32 file system. Only Windows itself has never been able to do this, so you always ...
Use Preview: Open the PDF in Preview, click File > Export, select “Reduce File Size” under Quartz Filter, and save. Use ColorSync Utility: Open the PDF in ColorSync Utility, click File > Export, ...