There are many Raspberry Pi guides out there that helps you to transform your Pi into a server supporting downloading torrents and sharing files via Samba and DLNA. However, they all have a major flaw: supporting only ONE hard drive. In this instructables, I will help you to setup Transmission, Samba and miniDLNA on your Raspberry Pi to support as many hard drives as you like (as long as there is enough power)
List of required components:
1. Raspberry Pi Model B for internet access
2. Powered USB hub
3. Power supply with 3-4A
4. (Optional) USB Wi-Fi dongle. Guides on setting up the Wi-Fi dongle are plentiful. You can do it with command line via SSH or from the GUI.