My computer wont recognize my USB

MSC stands for Mass Storage Class. Used in connection with USB connected devices. Full term is USB MSC. Its a protocol used to transfer files between a USB device and a computer. MTP Media Transfer Protocol is the modern equivalent. Some devices like for example the Garmin Sat Nav default to this latter protocol when connected to a PC.

Try to reset the device and if there is any driver for it, install them before connecting it to the computer.

Your system should support it, most likely your computer doesnt recognize the device on MTP mode, you can switch this on the device, go to Setup Mode > System > USB Mode > put the USB Mode to MSC, and then reconnect the MP3 player to your computer, the MP3 player should then show up as a Removable Disk drive under 'My Computer'.

Hello,

Transfers onto the m240 can be done in 2 USB connection modes:
MTP mode: Media Transfer Protocol using software, e.g. Windows Media Player 10 or higher.
MSC mode: Mass Storage Class using Windows Explorer, looking in "My Computer" viewing the player as a removable disk.

Typically, songs put onto the player in MSC mode can not be viewed in MTP mode and the other way around.

Switching to MSC mode in the player's menu:
Look in the player under Settings Menus > USB > select MSC for using the "copy and paste" or "drag and drop" method for transfers in "My Computer".
When Auto Detect is selected, it depends on the configuration of the computer, what setup for priority has been installed.

Forcing the player into MSC mode:
1. Turn device OFF.
2. Facing the hold switch slide it to the right so an orange color would show putting the device on Hold.
3. Connect the device to the PC.

Information for the USB connection mode and how to make hidden files in XP and Vista visible, on the support site:
http://kb.sandisk.com/app/answers/detail/a_id/447

Manual for the m200 series players (readable with Adobe Reader):
http://mp3support.sandisk.com/downloads/um/sansa-m200-um.pdf

Need more help ? Don't hesitate to add a comment.

Hello,

Media players have certain folders for holding the data in the player.
Most players (not all) will accept 2 ways of files transfers and depends on the USB connection mode.
Some players switch automatically into the operating connection mode when connecting the USB cable.
Other players can be switched through specific key operation on the player or using the menu in the player.
Consult your manual or use internet support for information about your player's functions. See if you have to install software and maybe updates as well.

1. USB cable connect mode MSC = Mass Storage Class.
Using the explorer in "My Computer", seeing the player as an external flash drive:
When the files are not put into the correct destination folder, the content will not be kept in the memory of the player.
Before disconnecting in MSC mode always go through "safely remove hardware", the icon in the right corner of the computer screen: disconnect the player's flash drive in the icon "safely remove hardware", before pulling out the USB cable.

2. USB cable connect mode MTP = Media Transfer Protocol.
Using a software program like Windows Media Player 10 or 11, the player should be recognized as a media device:
Files must be put in a playlist on the computer first: create a playlist.
After that, synchronizing of the playlist onto the player has to be done.

When needing more help, just add a comment in this thread.

Sandisk about this problem songs not being recognized on the computer but still on the player:
http://kb.sandisk.com/app/answers/detail/a_id/447
Use this links as main help thread.

The standard connection type of C200 series is MTP = Media Transfer Protocol. In this mode you can see the connected device as a portable player.

Songs that are put on the player in UMS = Universal Mass Storage mode (also called MSC = Mass Storage Class), seeing the device as a removable disk can only be seen in the players' UMS mode and vice versa.

Check the setting of the USB mode on the display of the C250:

Main Menu
> Settings / USB / Autodetect or MSC mode

Autodetect = MTP mode: computer sees the player Sansa C250.
MSC mode: computer sees a removable disk.

Now 2 things could have happened:

1. Music is put on the player in MSC mode and now the player is
connected in MTP mode or vice versa.

2. There are bad sectors or corrupted files are transferred on the players' removable disk.

• In case of bad sectors a recovery is possible: in MSC mode perform check disk as told in the link above.

• In case of corrupted files a format of the device is needed. First a backup of all data has to be made. Next perform format. This can be done in 2 ways:

Using disk management:
http://kb.sandisk.com/app/answers/detail/a_id/107
Using Windows Media Player:
http://kb.sandisk.com/app/answers/detail/a_id/444

Option 2. having problems with the disk or data on the players' disk can also be solved by updating the firmware.
For firmware update see link:
http://kb.sandisk.com/app/answers/detail/a_id/315
Remember: before updating backup the data from player to the computer.

When more help is needed just post a comment.

Make sure USB mode is MSC....If this doesn't work make sure that you are connected to a 2.0 USB port....I had to install the update on to my labtop and finally it recognized it and updated....
Download Update if you haven't yet(http://mp3support.sandisk.com/sansa/Installer/1082/SansaUpdaterInstall.exe)
Then connect to your computer and see if it works
Hope it does..........Please rate

Switch the Player to MTP Mode instead.

• The USB mode uses a file transfer class called the MSC (Mass Storage Class). This was developed as a way for files to be transferred onto an external drive such as a flash drive or an external hard drive.
• In this mode, your mp3 player will look and function like an external hard drive in that it will appear in My Computer as a separate drive. This transfer class is not very specific to the transfer of media files so the MTP (Media Transfer Protocol) was introduced.
• The difference with media files, specifically music files, is that they demand much more management.
• Downloading services can require special licensing and a limit on the number of playbacks a music file can have.
• The acquisition, restoration, updating, and backing up of these licenses as well as compatibility issues with file type and compression ratio within these digital music players demanded a more user-friendly and functional approach to file transfers.
• For this reason, you will need to have Windows Media Player 10 or 11 available on your computer to utilize MTP.
• Those with Windows Media Player 9 on their Windows 98 SE, Windows Millennium Edition, and Windows 2000 operating system will need to update using our Download Center.
• We recommend the use of MTP over MSC (the USB mode on your player) because it is more specific to the transfer of music files. To change this setting, press the power button on your device once it’s connected to the computer until the USB icon disappears.

• The USB mode uses a file transfer class called the MSC (Mass Storage Class). This was developed as a way for files to be transferred onto an external drive such as a flash drive or an external hard drive.
• In this mode, your mp3 player will look and function like an external hard drive in that it will appear in My Computer as a separate drive. This transfer class is not very specific to the transfer of media files so the MTP (Media Transfer Protocol) was introduced.
• The difference with media files, specifically music files, is that they demand much more management.
• Downloading services can require special licensing and a limit on the number of playbacks a music file can have.
• The acquisition, restoration, updating, and backing up of these licenses as well as compatibility issues with file type and compression ratio within these digital music players demanded a more user-friendly and functional approach to file transfers.
• For this reason, you will need to have Windows Media Player 10 or 11 available on your computer to utilize MTP.
• Those with Windows Media Player 9 on their Windows 98 SE, Windows Millennium Edition, and Windows 2000 operating system will need to update using our Download Center.
• We recommend the use of MTP over MSC (the USB mode on your player) because it is more specific to the transfer of music files. To change this setting, press the power button on your device once it’s connected to the computer until the USB icon disappears.

• The USB mode uses a file transfer class called the MSC (Mass Storage Class). This was developed as a way for files to be transferred onto an external drive such as a flash drive or an external hard drive.
• In this mode, your mp3 player will look and function like an external hard drive in that it will appear in My Computer as a separate drive. This transfer class is not very specific to the transfer of media files so the MTP (Media Transfer Protocol) was introduced.
• The difference with media files, specifically music files, is that they demand much more management.
• Downloading services can require special licensing and a limit on the number of playbacks a music file can have.
• The acquisition, restoration, updating, and backing up of these licenses as well as compatibility issues with file type and compression ratio within these digital music players demanded a more user-friendly and functional approach to file transfers.
• For this reason, you will need to have Windows Media Player 10 or 11 available on your computer to utilize MTP.
• Those with Windows Media Player 9 on their Windows 98 SE, Windows Millennium Edition, and Windows 2000 operating system will need to update using our Download Center.
• We recommend the use of MTP over MSC (the USB mode on your player) because it is more specific to the transfer of music files. To change this setting, press the power button on your device once it’s connected to the computer until the USB icon disappears.