From the firmware version V1.50, every NVS can copy RED SSD through RED station.
The RED station can be connected to NVS1501/2501/2500 through USB2.0 host, so the copy speed is rather slow(27MB/s, 1GB in 1 min).
NVS2525 can connect the RED station through eSATA.
In this case, the copy speed is 90MB/s(5GB in 1min), so very fast.
RED station needs more power than NVS can provide, so you need power adapter for RED station when connecting with NVS.