Okay, I need some help, please

You don't mention what type of PC you manage your clip on .. but if it is a MAC

Plug the Clip in via USB

Click on the Sansa Clip listing on the left
- Not the disk itself, the DEVICE.
Click the 'Partition' tab
Under Volume Scheme, choose '1 Partition'
Click the 'Options...' button
Choose 'Master Boot Record', then click ok
Click the drop down next to 'Format:' and choose "MS-DOS (FAT)"
Click Apply
(Thanks to Pardsbane over at the anythingbutipod forum)

When this is complete, you can eject the disk if needed, and your clip should be back to normal.
You will probaly lose all music files when you do this.. but at least you will have your Clip back to a functioning device

If you have a Windows based PC
I suggest you first have the Sansa Updater installed or become familiar with how to manually update
Plug in the Clip via USB
Go to My computer
Delete one of the music files within the Music Folder
Close all
Test the clip
If this doesn't fix it..

You should reformat the drive
You will lose ALL music audio books stored on the drive
In My Computer Right Clik on the Sansa
Clik Format
Clik OK
When Complete run the Updater
Now try to place a album or song via WMP on the Clip
Test the clip before putting more music on it

Hope this helps

try going to "my computer" on your desktop and it should show an unkown device thats plugged into one of your drives

1 Check to see that the player is in MSC mode by going to the USB mode section in the Settings menu.

Step2 Plug the SanDisk Sansa MP3 player into your computer.

Step3 Click on the Start menu.

Step4 Click on My Computer.

Step5 You will now see a drive for the device and one for the SD card.

Step6 Double click on the Sansa device.

Step7 Go to the My Music folder or the location of your music files.

Step8 Choose songs from your folder and drag and drop them to your Sansa device.

I hope that helps..
Please rate accordingly
Thank you
Computerrep

What I would recommend you to do is to make sure that your device is under MTP mode instead of MSC...to do that go under menu,setting, usb and then there should the two mode listed there...then you want to plug your device in the back of your computer..not in the front..that is very important....once you do that..open up your windows media player...click on your start thee sync panel..if your device is recognize properly it will be showing there on the right side..and if its not listed properly, it will say connect a device..if thats the case..click on your start menu right click on computer and then click on propetties, click under hardware and then device manager..your device should be showing there...check under disk drives to see if your device is showing there and if it doesnt you want to right click and hit uninstall...we dont want your device to be under disk drive ..we want it to be under windows portable device...once you uninstall it...go to http://www.sandisk.com/DriverDownload/index.asp and find the driver for your device..and then connecct the device on the back of your computer...it should work properly..if you are still having any problems..let me know..i would be more than happy to assist you..
Please rate accordingly
Thank you
Computerrep

The reason it says connect a device is because your device is not been recognize by windows properly..

What i would recommend you to do is to uninstall the device and reinstall it back...tou uninstall it...assuming that you are running windows xp...click on start, right click on my computer and go to properties..you should have your system properties open then click under hardware then device manager...look for the sansa device..it usually located under portable device..if its not showing there i would recommend you to look for under disk drives and see if its there..right click on the device and click on uninstall...after you unintall it unplug your device from the computer and check to usb mode..it has to be under MTP mode or auto....after you check the mode open up your windows media player click on tools, options and click under privacy...clear the history and caches...after you finish you can plug the device on the back of the computer not the front then windows should recongnize it and it should work properly..if that doesnt solve the problems upgrade your windows media player to 11 even though you have done that already..Follow the link below to obtain the driver for your device..Select your device model and operating system.....
http://www.sandisk.com/DriverDownload/index.asp

I hope this helps..
Please rate accordingly
Thank you
Computerrep

What i would recomend you to do is to go under device manager to see if the device is recognize...you can open your device manager by click on start,run and type devmgmt.msc...that will open your device manager...check under hard drive, portable devices or universal bus serial controller...once found the device right click on it and uninstall it..once you do that....unplug the device and plug it back into a 2.0 usb port..after that windows should recognize your device...

To help you with that, I need to know what operating system your using (XP, Vista, ect...) and what other devices you have plugged into the computer. There are a few things you can try. When you plug it in, does it say it's connected? Does the "Found new hardware" wizard come up? Let me know, I'll see what I can do to help

In that case, I'd suggest you to check whether do you have latest version of USB 2.0 installed in your computer or not. Also you can try by connecting the device in different USB port.If still the same, please go ahead and update the latest MTP drivers.

Steps needs to be followed up to update MTP drivers :

1. With the Sansa connected to your computer, open the Safely Remove Hardware icon in the system tray.
2. Select the USB Mass Storage Device.
3. Click the Properties button.
4. Go to the Drivers tab.
5. Click the Update Driver button.
6. Select Yes at this time only, then click Next.
7. Select Install the Software Automatically, then click Next.
8. This should update the MTP Device driver. You may be prompted to restart the computer.

Hi-USB refers to the USB 2.0 standards. It appears your computer only has USB 1.* hardare on it's motherboard. If you have a free PC slot, you can buy a 2.0 USB upgrade card. It will speed up the transfer times between USB devices and your computer. As for your computer not "seeing" your sansa, try another USB cable. If that does not help, check under control panel/system/device manager to see if the device is properly installed. The sansa operates as a "removable drive" so you should see your player as another disk drive in windows explorer. If you have a drivers/installation CD-rom for your player reinstall them, or check the sansa website for possible newer updates. Good Luck!

I have a quick and painless solution for you.

First open your mp3 player and go to settings. Under the USB menu change it to MSC. Then plug in the mp3 player to the computer. Open the My Computer on your desktop, right click on the Sansa mp3 player and click Format. Make sure Fat32 is checked and Quick format is UNchecked. Then format the mp3 player. After that it should be clean and work just like a USB drive.

Hope this helps!