The lights on the front of your OneTouch drive provide useful information. The following table and associated images convey the LED Blink Codes and their meanings.

OneTouch I / II / Small Business Edition
Both Lights ON - May look like One (1) Solid Light - Power ON & Unit is ready	Alternate Blinking Lights - Processing Command / Transferring Data
One Off / One Blinking - Unit is in Power saving Mode	Both Lights OFF - Power OFF & Unit is not ready
LED: Both lights blinking rapidly	Drive State: Error condition (What now?)
OneTouch III (Turbo Edition is shown)
Both Lights ON - May look like One (1) Solid Light - Power ON & Unit is ready	Alternate Blinking Lights - Processing Command / Transferring Data
One Off / One Blinking - Unit is in Power saving Mode	Both Lights OFF - Power OFF & Unit is not ready
OneTouch III Mini
Light on - Power ON & Unit is ready		Rapidly Blinking Light - Processing Command / Transferring Data
Light Slowly Blinking - Unit is in Power saving Mode		Light OFF - Power OFF & Unit is not ready
OneTouch 4
LED:  OFF		Drive State: OFF
LED: ON (solid)		Drive State: Awake, no activity
LED: Blinking at 1 Hz (1 time per second)		Drive State: Reading/writing
LED: Slowly "breathing" - blinking between 20% and 80% illumination		Drive State: Spinning down/sleeping
LED: Blinking rapidly at 4 Hz (4 times per second)		Drive State: Error condition (What now?)

My drive is blinking an error code.  What now?

Troubleshoot the error by following these steps:

1. Safely remove the drive (if possible).  See Document ID: 194471 for instructions.
2. Completely disconnect the drive - its power and USB/Firewire cables.
3. Wait 20-30 seconds.
4. Reconnect the drive.
5. Turn the drive on again.
6. See if the rapid blinking has been resolved.
7. If not, run a diagnostic on the drive.  See Document ID: 192251 for instructions.
8. Also, safely remove the drive and then connect it to a different computer running Windows XP/2000, if possible (though Vista and 7 are fine for Maxtor OneTouch III and 4). 
9. If the drive is not detected in (My) Computer, follow the troubleshooting steps in our external hard drive troubleshooter.
10. If all these steps fail, check the drive's warranty status at our Warranty Services page.  You can create a defective product return order there if the drive is still under warranty.