Assuming you have connected the drive and then restarted the computer with the drive connected and powered on... if it is model 31714 (not the same as the picture no power supply is required - if power supply is required make sure unit is powered on prior to connecting)
First guess at your problem. Your disks are formatted for a operating system other than what you are using. (Mac formatted disks on a PC or the other way around)
If you don't know how the disks were formatted you could test this by letting it get to the "insert disk" and then trying to right click and see if you have a format option ... note this will erase all information on the disks.. you will likely need to long format
Second guess the drive is bad... have seen cases where the drive is bad. If you have another computer you can use try hooking the computer up to another computer and see if you get the same result.
Let me know if this does not work and specific model number and op system I might have more ideas. I can also point you to a replacement If I know more about your system.
Answers & Comments
Assuming you have connected the drive and then restarted the computer with the drive connected and powered on... if it is model 31714 (not the same as the picture no power supply is required - if power supply is required make sure unit is powered on prior to connecting)
First guess at your problem. Your disks are formatted for a operating system other than what you are using. (Mac formatted disks on a PC or the other way around)
If you don't know how the disks were formatted you could test this by letting it get to the "insert disk" and then trying to right click and see if you have a format option ... note this will erase all information on the disks.. you will likely need to long format
Second guess the drive is bad... have seen cases where the drive is bad. If you have another computer you can use try hooking the computer up to another computer and see if you get the same result.
Let me know if this does not work and specific model number and op system I might have more ideas. I can also point you to a replacement If I know more about your system.