Repair system is unable to recognize the sansa

NOTE: MAC computers do NOT support MTP modes of USB conectivity in a MP player. A Sansa player in MTP mode when plugged into a MAC computer will NOT be detected or recognized. MAC computers supports Sansa players in MSC mode Sansa players can only be recognized by a MAC if the USB mode on the Sansa player is set to Auto Detect or MSC.
Check in the System Profiler Open System Profiler from the Utilities folder, which is inside the Applications folder. From the Contents column on the left, under the Hardware header, select USB; the panel to the right will show all the USB devices that the computer recognizes. It may not identify them correctly by name, but it should have the right number of devices listed. . Navigate to USB Mode settings. Sansa View - From the Main Menu, select More > Settings/Options > System Settings > USB Mode.
Sansa Fuze and Sansa Clip+ - From the Main Menu, select Settings > System Settings > USB Mode.
Sansa Clip, e200v1 series, e200v2 series and e200R - From the Main Menu, select Settings > USB Mode.
2. Select Auto Detect, MTP or MSC. e200R - PlayforSure is MTP and Rhapsody is MSC
See this tip posted here on this site for a better explanation on the modes - MTP and MSC. Solve your MP3 Player Connection Problem.

Have you tried going to settings, then system settings and changing the usb mode? I have had some computers not recognize my device and this has helped. MSC should be he default mode and your device should show as a drive. The MTP is for DRM management. I have also had a clip that did this and my usb cable was bad.

go to settings on ur sansa, go to usb then change it to MSB. that should fix it

do u have windows or mac system? if mac,
Although MAC OS is NOT a supported operating system, the Sansa player can still be recognized if the Sansa player is only plugged in MSC mode.

MAC computers do NOT support MTP
A Sansa player in MTP mode when plugged into a MAC computer will NOT be detected or recognized.

MAC computers supports Sansa players in MSC mode
Sansa players can only be recognized by a MAC if the USB mode on the Sansa player is set to Auto Detect or MSC.
See answer ID 207 for instructions on how to put your Sansa player in MSC mode.

See answer ID 1141 for instructions on transferring music to your Sansa player using iTunes on a MAC computer.

On your Sansa Go to "Settings" then "System Settings" then "USB Mode," change it to MSC, now try connecting it. If that doesn't work try the other modes just in case.
Hope this helps!

It's not to normal that it doesn't recognize the MTP mode. I think reading the minimal requierments should be useful. Thereafter untill I recomend you to use Windows Media Player. You put the music you want to be on your sansa in the WMP library. Then you go on the Syncronisation tab upwards to the vizualisation window. and the rest should roll on

On your Sansa Go to "Settings" then "System Settings" then "USB Mode," change it to MSC, now try connecting it. If that doesn't work try the other modes just in case.
Hope this helps!

The XP did not recognize the device because I used a after- marked USB expander board that did not provide enough power to the device. Plugging to the Motherboard - attached USB port solved the problem.

http://www.sandisk.com/sansa/#/support-0/

rate me fix ya

Go to settings on your sansa and scroll down to USB Mode.
Change it to MSC.