Generation of previews

Hello everybody,
I have MyCloud EX2 Ultra firmware 5.21.104 (latest version) 4TB RAID1.
I created a “Photo” file system and copied 0.8 TB of images (mostly jpg format).
The CPU has been at 100% for the “generation of previews” for 2 days.
Is it normal?
Is it possible to stop the preview? (I do not need preview)
the noise of the disks sound like that of a blender.
thanks in advance to those who can answer me.
S. R.

Hi @sterav,

Please refer to the article to check article Western Digital Hard Drive Noise:

Please refer to the article My Cloud OS 5: High CPU Usage and Slow Response Times After Update: