At the moment only File Sharing is turned on!
How do i create a Sharing User Account?
How do i downgrade the Admin account that others are using?
Also, if file sharing is turned off can some one enter my files?
Just make sure the password IS NOT stored in the Keychain (you will have an option for this when you create the encrypted drive or disk-image).Password protect that flash drive, so you need to enter a password to access anything on that drive.
You can set that up by erasing the drive with Disk Utility, and set it up to be an encrypted volume.
Anything that you copy to that drive will not be accessible without a password.