Defrag 22.1.2521 very slow without disk activity !

[pzweilin]

On Windows 10 1803 64 bits, O&O Defrag version 22.1.2521 has Remaining Time for 11 days 20 hours !!!

Defrag method : SPACE. Disk is not SSD, 1.6TB with 640GB free space.

Resource Monitor for Defrag shows :
- only CPU activity (all the time 25% during last 3 hours)
- no disk activity.

What is wrong ? I think that this process will never finish !
Is it useful to wait or is the Defrag crashed ?

[Brigitte (O&O)]

Closed, because of a similar request at support department. Note: The remaining time is just a prognosis that changes very often.