Analysis fails with 3tb drive

I have 2 3tb Seagate GoFlex Desktop external disks drives. After clicking 'Analyze', Defraggler reports 'Analysis Failed'

Richard Rein

This is a known issue.

Same happens on my external hard drive 2TB Iomega.

My 2T segate external drive gets a analysis fail on my windows 7 64 bit system but the 8T segate external works fine.

The same 2T drive can be defraggled on the windows 10 64 bit system ( identical hardware and same version of defraggler )