Firmware 4.00.00-607 needs to be updated ASAP

My Cloud OS 3 Personal & Network Attached Storage My Cloud
4

After a few days other problems occured with this new firmware 4.00.00-607

It took me hours to find out which were the datasets causing the problem (pdf’ and wpl’ files are certainly causing problems  during the  scanning process) but at last i decided to downgrade the firmware to v03.04.01-230

All problems were solved 

Thx to  http://community.wd.com/t5/WD-My-Cloud/Easy-method-to-downgrade-to-previous-version-of-the-firmware/td-p/773073