Thank you for contacting SanDisk Technical Support. It is our goal to make sure you have all the resources you need to get the most from your product through your recent inquiry into our product line.
We do apologize for any kind inconvenience this issue is causing you.
For verification, does your computer have Windows XP as its operating system?
This issue may be due to some sort of corruption on the Sansa m240 itself. We should try formatting the Sansa m240 as a possible solution.
Caution: Formatting will erase all information on the Sansa mp3 player. Please be sure to have a back up of all the information before proceeding.
If your Sansa m240 is currently frozen, please remove the battery (to unfreeze it), then put it back in, and connect it to your Windows XP computer.
Since you cannot access your Sansa m240 to convert to MSC mode, please have the ?HOLD? button ?ON? so that you can have your Sansa m240 in MSC mode before plugging to your computer.
To format the Sansa m240 on your PC, let us connect the Sansa m240 to your computer on an USB port preferably located near the power hub or to an external self powered USB hub, go to ?My Computer?, single right click on the ?Removable Disk? associated with your Sansa m240, and select ?Format?. Let us please make sure that, under FILE SYSTEM, we change FAT to FAT32, and then single left click ?Start?. This will erase all data off the Sansa m240 and correct errors on it, which should make the Sansa m240 usable again.
We also recommend formatting the Sansa m240 another way. Please be advised again that formatting will erase all data.
Please right click on my computer and select ?Manage?. When ?Computer Management? comes up, please click on ?Disk Management? on the left hand side. After clicking on ?Disk Management? you should now have a list of drives in the right side panel. On the right, look for the Sansa m240, it may show up as Disk 1, 2, 3? Removable Disk. Right click on the larger "Volume" rectangular icon to the right of the Removable disk and select ?Format? choosing FAT32. If you do not have the format option, please select "New Partition" and just keep clicking next through the Wizard that appears.
After formatting the Sansa m240, please do try your Sansa m240.
If applicable, please go the link below to download the firmware update for your Sansa m240. The link is:
http://www.sandisk.com/Retail/Default.aspx?CatID=1326 or http://www.sandisk.com/Retail/Default.aspx?CatID=1376
If formatting and firmware update in your computer is not possible, please do try the process again on another Windows XP computer.
NOTE: Please be aware that formatting is a normal and necessary method of drive maintenance and repair, and simply NOT formatting periodically can cause a drive to slip into failure due to the backup, and clutter of residual data.