I have recently updated a customer’s WD EX4 from version 1.02.42 to 1.05. The device has been in the field since 1/2014 and has had no major issues until the last firmware upgrade. Since upgrading to 1.05.30 and then to 1.05.36 I have had nothing but issues with the device. The CPU seems to stay near max or at max with even simple small file transfers. Network file transfer speed has slowed down to a crawl. Also, the backup to USB option quit working with the new firmware. I have checked everything else done to the customer’s network to be sure something else was not causing the problem and have narrowed it down to the EX4. I have even brough the EX4 back to my network and I see the same performance issues with a single user connected. I have performed the quick and full disk tests, and the system test, and everything appears to be fine. Is there anything I am missing? Also, are the older versions of firmware (specifically 1.02.42) still availible anywhere already built. I found the source code downloads, but not the prebuilt, installable download.
Thank you for any help or suggestions.