Alpine cde 121 does not recognize usb

It is a good possibility that the USB port is defective. You may try a different cable to see if it has the same results.

The Alpine CDE-103BT requires only USB media that is FAT12/16/32. You can format your USB medium on your PC to FAT32 then copy your media (music) to the the USB drive.
Insert your USB Drive to the PC On your PC navigate to Start ->MY Computer Then locate your the drive that is your USB Drive. At this time you will want to save any of your data before continuing. All Data on the USB drive will be lost. Next ensure that you have selected the correct drive. Right Click on the drive on go to format... Under File System select FAT32. I would suggest leaving Quick Format unchecked. So you ensure that will information is removed. Then Click start. Next copy your media (music) back to the USB Drive. Insert in to the CDE-103BT Stereo.
Notes: MP3/WMA/AAC files are prepared, then stored to a USB memory. This unit can recognize at least 100 folders (including root folder) and 100 files per folder stored in USB memory. Do not make a file's playback time more than 1 hour.

une or more speakers wires are touching ground or is in short...

I also have the same question, can any one help? How do I get the clock to stay on, on the Alpine cde-102?
The moment you switch off the system the clock goes off, even if the car is running.

make sure the ipod classic has up tp date software on it. ive had this problem before and the ipod had old software on it. should work just fine unless something is wrong with the ipod classic. good luck

I just got an A-male to A-female USB extension cable to hook up to the back of my Alpine CDA-9886 headunit and connect to my 32GB USB. All of the songs are MP3 and works with my brother's headunit. But when the USB is plugged into my headunit, it says error. How can I fix this?

Hello desoren,

The receiver may not be set to recognize MP3 files.

Press and hold "sound setup" until the unit enters setup mode. Rotate the volume knob to "play mode" and press "enter". Check that the setting is CD/MP3 (not CD/MA), or rotate the volume knob to change the setting to CD/MP3 and press enter again. Press and hold "sound setup" again until the unit exits sound setup.

If the files are still not recognized, I'd try using a different USB drive, a different computer to write the MP3's, and/or a different application to download or rip the original music content.

Hope this helps.

The cord might likely the problem. The iDA-X100 will only recognize iPods if you use an original Alpine USB cord. Using any other cable won't work. I had this problem when my Alpine cable fell apart and stopped working. I thought any other cable would work, but that's not the case.

Make sure the USB device is formatted to FAT32.
I use both a 1GB Creative Zen nano and a 120GB Freecom mobile drive XXS with no problems other than the fact that the freecom has WAY more folders thatthe head unit can read!