Sometimes network devices supplied by internet service provides can be a little basic, so upgrading may be necessary. You should also check that your router has a USB port and that it supports NAS. Related: How to Easily Share Files Between Mac and Windows If, however, you will be plugging the external disk into both Macs and Windows PCs, you should format it as FAT32 or ExFAT to ensure compatibility with both operating systems. If you’re not going to be physically connecting the NAS drive to other devices, the format you use doesn’t matter. How to Set Up Network Attached Storage in macOS
