You want to move a HDD from one device to another, can this be done for both ProxySG and ProxyAV?
1. You cannot move HDD from ProxySG 1 to ProxySG 2 simply because it is tied to its devices Serial Number.
2. The same is for ProxyAV, you cannot move between 2 different ProxyAV.
3. An RMA HDD works because the new disk has be reset in test chassis and it is not tied to any Serial Number.
Bottom line is, never exchange HDD between devices as it might corrupt the configuration of the ProxySG or ProxyAV. Always request for RMA for a faulty HDD and wait for the HDD to arrive and plug it into the device.