The file system controls how an external hard drive stores files, handles large files, and works across devices. NTFS is Windows-focused and supports permissions, compression, and large files. exFAT is simpler and works better across Windows, macOS, cameras, TVs, and other devices, but it lacks NTFS permission features.

Before formatting, decide how the external HDD will be used. Formatting changes the file system and removes existing files from normal access, so back up needed data first.

Step 1. Select the external HDD by model and capacity, then confirm the drive letter matches the disk you want to format.
Step 2. Choose Format for the target partition.

Step 3. Choose NTFS if the drive is mainly for Windows backup, permissions, work files, or large Windows-only storage.
Step 4. Choose exFAT if the drive needs to work with Windows, macOS, TVs, cameras, or other devices without the FAT32 4GB file limit.
Step 5. Enter a clear volume label, preview the operation, and confirm the correct external HDD is selected.
Step 6. Click Proceed. After formatting, copy a large test file and safely eject the drive before disconnecting it.
Choose NTFS for Windows reliability and permissions. Choose exFAT when the external HDD must move between Windows, macOS, TVs, cameras, or other devices.