I am using this every day for two years and it is almost like new after all this time. The silicone case is covering the phone edges protecting also screen protector edges. So after all this time the screen protector is still on without air boules and no scratches.
Hopefully I will find same quality case for a new phone model.
It accommodates two hdd and on Raid 1 it provides minimum security for essential data. The USB 3.0 connection assures high speed transfer data (approx. 150 MB/sec.) and the device is hot-swapping which is a plus.