What is usb mode and how do i find it - Mustek DV520T Digital Camera

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.

Look for changing the USB mode of the device to MSC or MTP
Go to USB Mode settings. if you have a Sansa View - From the Main Menu, select More -> Settings/Options -> System Settings -> USB Mode.
if you have a Sansa Fuze - From the Main Menu, select Settings > System Settings > USB Mode.
if you have a Sansa Clip, e200v1 series, e200v2 series and e200R - From the Main Menu, select Settings > USB Mode.
Select Auto Detect, MTP or MSC. e200R - PlayforSure is MTP and Rhapsody is MSC
NOTE: The USB mode is not selectable for Sansa View (FW 1.03.XX and below), Sansa e200v2 (FW 03.01.14 and below), and Sansa Clip (FW 1.01.11 and below). The USB Mode setting can be enabled on these players using a firmware update.
For a more detailed explanation of MSC and MTP modes see my tip posted here --- -> http://www.fixya.com/support/r3774047-solve_mp3_player_connection_problem <-

in the manual it says Turn on the MP3 Player by holding the PLAY/PAUSE button. 2. Take the USB Cord and plug the corresponding ends into the MP3 Player and a Computer. 3. When connected the LCD Display will either say “USB” or “MTP”. 4. Press the “M” (mode) button to switch between “USB” and “MTP” mode. “MTP” mode will only work, when your player is connected to Microsoft® Windows® XP and Windows® Media Player 10. The MP3 Player will only work in “USB” mode when it is connected to Windows® 98SE, ME, or 2000 Professional. 5 is this helpful.Take your time sometimes these things don't work because you've missed out one step so go slow and try it two or three times before you give up

in nokia 5200 go to
setings > connectivity > data storage
more over data storage & usb mode are similar to each other

Here's a work around. 1) Plug the USB cable in and let enter Sync Mode as usual. 2) When the Garmin unit is in Sync mode, unplug the USB cable. 3) The Garmin unit will start to exit Sync mode, at which time, IMMEDIATELY plug the USB cable in again. 4) If you plugged in the USB cable in time, notice the Garmin unit will remain out of the sync mode.

Usb mode is in settings push center button choose between msc or mtp.... MSC will allow you to see the expansion card mtp won't.....MTP shows you your music folder in the media folder thats where you put your music plus expansion.....If no usb mode the player is manufactored to be in msc mode make sure your usb 2.0 driver is installed

Well, is it in MTP mode or MSC mode (menu > settings > USB)?

If it's in MTP mode, Windows Media Player should recognize it.

If it's in MSC mode, it acts like a USB thumb drive.

You should be able to add music in either mode, but I've found MSC mode simply doesn't work, though it once seemed to. Also, the Sansa m230 will not work with USB 1.1, only 2.0. Next time, I'm getting something Rockbox runs on!

I wish to transfer my DCR-TRV480 NTSC video to my PC. I have set my camera to Play/Edit mode. However, when I insert my USB cable into my video camera, the message "Disconnect the USB cable before changing the setting" appears, preventing me from playing/transfering my video. What can I do?

bhanchod madarchod i also have the same problem so let us do one thing we should do a case on samsung

Upgrade your firmware.
http://www.sandisk.com/Retail/Default.aspx?CatID=1376