exFAT cluster size 4096 bytes - Safety?

Hi i have an external My Book 2TB and i try to copy from other drive have NTFS to this with exFAT and the size on disk 700GB and in the exFAT disk is about 1.5TB.

So after some read i formated the driver with exFAT cluster size 4096 bytes and now everything have the same size on disk.

The only way i found to do this is with cmd with admin rights.

Diskpart
List Disk
Select Disk
list partition
select partition
Format FS=ExFat UNIT=4096 Quick

But is safety to use cluser size 4096 bytes with exFAT?