Not able to delete transaction log backup file
The underlying partition was initialized using MBR (master boot record) instead of GPT (GUID partition table), and you've broken the 2TB file size limit.

I'm willing to bet that if you ever replay that log backup, it will fail because the backup would have stopped writing when it reached the 2TB boundary.

You will need to reinitialize the partition using GPT. As far as I recall, this is a destructive operation, meaning that you will lose any data on the drive, so back up all files on the D: drive (except that big one) before doing anything else.

Once it is reinitialized, format it as NTFS with 64KB block size (perfect for SQL Server backups), and turn on backup compression inside SQL Server to prevent this kind of problem in the future.

If SQL Server is using this drive for its data files as well, you will definitely need to arrange some downtime for this maintenance. Good luck.