How to Convert exFAT to NTFS on Windows 11 Without Losing Data

There are two free approaches you can use in Windows 11/10/8/7 to change an exFAT-formatted volume to NTFS. Because Windows' Convert utility does not support exFAT, every method ultimately involves re-formatting—so be sure to copy anything you care about to another drive first.

Method 1. Quick-format with Windows’ built-in GUI tools

The easiest option is to let Windows do the work via its own interface for exFAT to NTFS conversion:

1. Back up the files on the exFAT drive.
2. Open File Explorer (or Disk Management if you prefer a fuller view).
3. Right-click the exFAT partition ► Format… ► choose NTFS in the File system drop-down ► (optionally tick Quick Format) ► Start.

The same NTFS format choice is available via Disk Management (right-click Start ► Disk Management). The wizard wipes the old file system and recreates the volume as NTFS in one go. 
diskpart.com

Method 2. Re-format from an elevated Command Prompt

If you like keeping things scriptable—or you're working on a Core/Server install with no GUI that uses the classic format command:

format E: /fs:ntfs /q /v:MyVolume

Replace E: with your drive letter; omit /q if you want a full surface scan.

You can also step through diskpart for converting exFAT to NTFS if you need to blow away all partitions first. Both tools ship with Windows, so there's nothing extra to install.

list disk
select disk #
clean
create partition primary
format fs=ntfs quick