Go to the control panel and select "system and security" > click "administrative tools" > click "computer management" > In the left panel click "Disk Management" > Right click on the drive you want to format and select FAT32 as the file system type.
Alternatively you can open a command prompt with administrator privileges and type the following where X: is the drive you want to format.
For some reason you can't just right click on a drive in Windows Explorer and format it with your desired filesystem like you have in the past. I don't get why unless they're trying to EOL Fat32 since people can use exFAT for portable flash media and NTFS is usually fine for larger external hard drives.