|Tip 106||Protect USB Memory Sticks|
Lots of people use USB memory sticks to transfer data from one computer to another or just to keep their files with them at all times.
OS X lets you format a USB memory stick so that its contents are encrypted. You’ll need to enter a password whenever it’s inserted.
Essentially this turns any USB stick into a ultra-secure portable file storage device, of the type often sold at a premium. However, there are a number of caveats, as follows:
The memory stick must be Mac-formatted, which is to say it must use the GUID Partition Table (GPT) system. Out of the box, most memory sticks are formatted as Windows-compatible FAT32/FAT32X, which your Mac can read and write to but cannot encrypt. Therefore, the first step ...