My Sandisk zipclip is frozen; says I need to connect to a PC to delete >20M of contents. Yet I can't get my PC to recognize the device. Sandisk tech support is unresponsive to my requets for help.

SOURCE: Sandisk sansa e200

I had this same problem on my sansa and tryed the previous solution with no luck. Out of frustration i email the sansa technical support. Try these steps to format the player: -Turn on the player and access MENU > SETTINGS > USB > MSC - Once the player is set to MSC mode, reconnect it to the computer and open the My Computer window. - Once you see the Sansa icon in the My Computer window, right-click it and choose FORMAT - In the Format window, choose FAT 32 and make sure that Quick Format is NOT selected, then choose START -Once the format has completed, disconnect the player from the computer to allow it to refresh. If you plan on using Windows Media Player to transfer files, return to the USB menu and set the player to MTP mode. Otherwise, leave the player in MSC mode and you can now resume transferring files. Formatting your player will deleate all files but you can putt them back on!!! Best of luck!

SOURCE: Help me fix my Sansa c140

i had exactly the same problem and than i wrote the guys on www.sandisk.com they had my device replaced.

SOURCE: mp3 player will not work "usb device not recognized"

license key problem

SOURCE: I deleted files in garmin 205W now I lost voice and languages

I also had this problem while trying to register a Nuvi 205W. I talked to someone at Garmin tech support and found that I was using USB cable that was only meant to plug in to my computer to recharge the unit. I have now sent for a data transmission USB cable, will see if that solves the problem when it arrives. Hope this helps.

SOURCE: when i connect my sandisk

Try it in somebody else's PC, if their PC can't read it either your cruzer is defective.