OS5 PR4100 BUG PROBLEM since update from OS3

always on “Indexing” for 4To => now since 10 days

I just looked, there is an alarm
a problem “fan” speed not normal
it is certainly due to the fact that he has been indexing for ~10 days the HDD working …

I restart the PR4100
fan is running
fan drops
fan speed 510rpm on the front display PR4100
Now fan speed 540rpm and always in indexing
CPU 25% and RAM 92%

How to stop this indexing without stop the CloudAccess !

can i use WDMyCloudEX4100_5.05.111_prod.bin ?
https://community.wd.com/t/my-cloud-os-5-firmware-release-note-v5-05-111/258578