The main reason a home user will copy and fill up most of their My Cloud Home (MCH) is for media serving. The MCH runs OS4 which is different from OS5, but everything about indexing on OS5 seems to apply to the MCH.
The MCH has the further disadvantage of using slow SMR hard drives vs generally CMR hdds on the OS5 and the SMRs are not user replaceable on the MCH.
You may want to reconsider and use something else for a Plex Media Server or get a MCH with a larger disk (such as the 8 TB) as the smaller SMR hard disks (2, 4 or 6 TB series of WDxxEFAX hdds) will perform very poorly as it is incrementally close to the limit of its capacity.
