Join Date: Jul 2010
Location: United Kingland
I'd just go to the police.
Very honourable of you to consider the fact he's your brother, but he's clearly not considering you at all. So, go to the police and tell them what he's done. Broken into your computer, damaged your property and stolen your hard drives.
Remind your brother about the ongoing cybercrime initiatives in the UK and that the police won't look too kindly on him for this.
Also, crack the password yourself using a bruteforce rar cracker. But still, screw your arsehole brother and report him for stealing from you.