How do I encrypt/password protect an external drive?

Question

Hey, I have over 80 gigs of music saved on an external hard drive I use with my MBP. I take this disk to different studios, etc and want to make sure that I am the only one who can access the external drive when it is plugged into a computer. Is there a way to encrypt/passwork protect an entire external drive? I looked into the disk image thing, but as far as I can tell there are space limitations with this (or am I wrong)?
I would really appreciate anyones help with this. Thanks.

Answer 1

If you want to password protect a folder ...
Launch /Applications/Applescript/Script Editor
Paste this in:
on opening folder This_Folder
repeat
tell application "Finder"
set dialogresult to display dialog "Restricted Folder. Please enter the password to access folder:" buttons {"Ok", "Close"} default button 1 default answer "" with hidden answer
copy the result as list to {PWText, button_choice}
set button_choice to the button returned of dialogresult
if button_choice is equal to "Ok" then
set PWText to the text returned of dialogresult
if not PWText = "your password" then
display dialog "Access Denied" buttons {"Ok"} default button 1
else
display dialog "Access Granted" buttons {"Ok"} default button 1
exit repeat
end if
else if button_choice is equal to "Close" then
tell application "Finder"
close folder This_Folder
exit repeat
end tell
end if
end tell
end repeat
end opening folder
Click 'Compile' then 'Save As'
(Where it says "*your password*" insert the one you want)
Then CTRL-click on a folder / (Enable Folder Actions if not on) / Configure Folder Actions / Activate and select your script.