2020 Outback Onyx XT
Can you use disk utility to format it?Another stumbling block - can not format the USB drive to NTFS on the Mac. It looks like the options to do this are somewhat involved.
Macs support a variety of file systems. By default, they format disks with the Mac-only OS X Extended file system. But, if you plan on using an external drive with both Macs and PCs, you should format the disk with the exFAT file system instead.