Massive data transfer

Thanks for your rreply.  I appreciate that the data transfer rate is normal for the type of connection. The data transfer rate however is not the question.  What prompted my question is that it didn’t need to do this massive data transfer when the drive was first set up. It only happened after an update I did.  And surely it is not neccessary to transfer such huge amounts of data every hour when maybe only one or two small files have changed, if that?  In normal operation, it only seems to need to transfer the data of the new or changed files.

The 300Mb/s data transfer continues for a couple of minutes. It must be a huge amount of data as I can download files of several Mb from the web, peaking at maybe 30 Mb/s, in a second or so.  This data transfer is only associated with the WD drive and or software as if I disconenct, it doesn’t occur.