Works; can be better

Works for testing transfer speeds for files 1 GB to 5 GB in size. Can be better if smaller file sizes were supported, such as 500 MB or 250 MB for testing smaller capacity USB drives.

Interface is a bit big and doesnt fully fit on my Macbook Pro 13" screen (1280x800). A more simplistic UI option would be nice.

ceraf about Blackmagic Disk Speed Test, v1.0