In response to your request, I have a similar set of problems to Dirk’s. I bought my WD My Cloud EX4 in January 2014. I had a lot of problems initially with its slow data transfer speed, but I solved them by repositioning the EX4 drive closer to the router and using Ethernet cables rather than Powerline or WiFi. It’s not super fast now, but it’s fast enough. I’m using it as my main drive with two 3TB discs under RAID 1.The EX4 firmware is version 1.02.25, which is up to date.
I have tried three different ways of backing up my EX4, none of which is satisfactory:
(1) USB device - I tried a USB 3 backup from the EX4 to my 3TB My Book 1140 Essential, but I could not access it, and I received a warning that it was not compatible and faced imminent failure, which was a big disappointment given that it’s a WD backup product. Also my upgraded Smartware Pro (version 2.2.1 downloaded yesterday) did not allow backups from an EX4 to a disk on my PC, only from a disk on a PC to the EX4.
(2) 3rd disk - I also tried inserting a third disk into the EX4 running under RAID 1 but formatted as ‘Volume 2’ under JBOD, which I had hoped to use for backups. But I could not create a share on this volume so it did not appear as a destination option on the EX4’s backup pages, which meant that I could not use it as a backup disk.
(3) RAID 1 - Finally, I tried an internal backup from my personal share (185GB of data) to a backup share that I had created, both being on my EX4 under RAID 1. I thought this had failed after 6 hours as it showed 96% complete, while only a small % of the data had been backed up. It finally backed everything up after 14 hours. Surely this is far too slow, when the backup process all happens within the same disks on the EX4 and I am able to copy the same amount of data from the EX4 to a disk on my PC in less than 2 hours at 30 MBps (7x faster!).
I would welcome any help or suggestions, please.