How do i reformat Windows NT File System (NTFS) in Monterey?

Jammmi3 wrote:

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Is there anything I can do? If I try to go to disk format > external drive > erase and choose MAC OS Extended (either one) it says 'the volume on disk4s1 couldn't be unmounted because it is in use by process 20901 (AdobeAcrobat)'

What do you mean by "disk format"? No such app or tool on a Mac. Do you mean "Disk Utility"? link ➡️ Disk Utility User Guide for Mac - Apple Support

Make sure all Adobe apps are completely closed. You can use Activity Monitor to close any app that may be using the hard drive. link ➡️ Activity Monitor User Guide for Mac - Apple Support

I read if I reformat it to exfat the maximum file size I can use is 4gb, which is not convenient as I'm a graphic designer who uses large files.

Fat32 has the 4GB file size limit. exFat does not. It can hold large files way beyond 4GB. https://www.hcc-embedded.com/products/fat-file-systems/exfat

With that said, unless you are planning on using the drive with a Windows computer, use macOS Extended Journaled HFS+ or APFS.

You should be able to force the unmount using a terminal command if Disk Utility won't do it.

diskutil unmountDisk force /Volumes/VOLUMENAME

Replace "VOLUMENAME" with the name of the disk you wish to unmount. Be very careful here with the name you use, it must be the drive you want to erase or you can unmount other drives attached to your Mac.