Block Size on Disk

After a disk has been formatted with NTFS it can be slightly tricky to figure out what block size it has been formatted with. Although there are several ways to find this info, the most straightforward way is to use cmd line.
Enter the following command:
fsutil fsinfo ntfsinfo c:

 

 

This illustrates that the block size on the c: drive is currently set to 4K.

 

 

 

If you ever need to change the block size, the best way to do this is to open up Computer Management > Storage > Disk Management

Right click on the volume and choose Format

From the drop down list choose the block size you need

Tick the box for Quick Format and click OK

 

The disk should now be formatted with the block size that you require