The messiah2 wont work with the hdd with backups. It could in sleep mode. The regular dms3 can play backups with the hdd. You have to use the fast boot method. But the 50000 MB with remote is a good deal though because it includes an hdd but you have to buy it seperately. The dms3 v9 will be the solution for you. I hope this helps for you.
scph-50001/n v9 matrix infinity fw: 1.91
AMD Opteron 165 Powered!
Burner: NEC ND-3550 v1.Y6 RPC1
Next Consoles: PS3 60 GB and PSP Entertainment Pack