Constant indexing resulting in fan and slow access = Nearing the end of my patience with OS5

Revert to OS3, t least it was functional and your HDD’s would definitely live longer. OS5 may be usable one day but that day is at least several months away. Beware, it only applies to PR2100/PR4100 now (I’ve successfully reverted on PR4100).

https://community.wd.com/t/guide-revert-my-cloud-os5-back-to-os3/260621/11