Connected 8G SanDisk Sansa Clip+ MP3 player to tablet. On ejection all Music etc folders were empty. Found files in Lost.Dir with unusable names locking up 6G space.

SOURCE: cant see files in the system

the sansa players have 2 usb modes. mtp and msc. when you are saving songs in one mode, you will not be able to browse the files in the other mode. the preloaded tracks are usually in mtp mode. To switch mode, go to Settings in your MP3 player. Then choose USB. Auto Detect is also MTP.

SOURCE: Empty folder

There may be possible reasons why your Sansa E250 would display an message on the LCD even when you've downloaded files to it: (1) The music file type is not supported by the player. Sansa players support only MP3 and WMA files. To determine what file type your have, right click on the file type and it should display the "properties" dialog box. Check if it is MP3 or WMA. For example, iTunes music files will not work with the player, nor will WAV or MIDI files. (2) Your music files are supported but the bit rate is not within the range that the player supports. Sansa players support MP3 files up to 128 KBPS and WMA files up to 64 KBPS. You may need to use a 3rd party music file editor to convert the files to a supported bit rate (3) You may have saved your music files in a folder and copied the folder to the player. Your Sansa E250 will not recognize folders. Either save them in the root directory or inside the "Music" folder -- your player's default folder for music files. Hope this info helps :)

SOURCE: SanDisk Sansa m230

I would recommend that you update the firmware on your device..that usually solve the problem you are having..To update the firmware, follow the link below..
http://www.sandisk.com/DriverDownload/download.asp

I hope that helps
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Computerrep

ThaMp3Doctor

• 8597 Answers
• Posted on May 26, 2008

SOURCE: SANSA c140 not sychronizing

Reformat

These are the most common methods for recovering Sandisk's Sansa Mp3 Players. I have been almost universally successful in recovering Sansa players using one or a combination of these methods. These methods do not work if you are having synchronization or music format issues - they are for recovering a player that will not power up, freezes, flashes, is not recognized by the computer, and a host of other issues.

Reset the Sansa Player first. On most models, restart is done by holding the power button in for 15 seconds or longer. Check your specific manual to be sure. The manuals are available from the Sansa website if they have been misplaced.
Download the Sansa Recovery Tool from the Sansa website.
Format - Erases Everything: Connect your Sansa player to the computer and open Windows Media Player. Click on the Sync tab. Pull down the drop down menu underneath the Sync tab by moving your cursor over the Sync tab and left clicking on the little black arrow underneath the Sync tab. Highlight "Sansa 1GB" (wording may vary slightly), and then select "Format." - this should erase everything.
Firmware Upgrade- Erases Everything: Get the latest firmware upgrade from Sansa - it updates the firmware and erases every song in the player all at once. Note: this method doesn't work if already have the latest firmware. Go to this website and click "Firmware Updater" to find out: http://www.sandisk.com/DriverDownload/driverList.asp
If these fail, then:
Try this: disconnect the player from the computer, turn it off, hold in the volume + button, and reconnect the player to the computer while holding the volume + button in. Keep holding the volume + button for an additional 5-50 seconds. Windows should eventually go into recovery mode and revive the player- it will pop up a window that says Found New Hardware Wizard.
If you get the problem where MTP Device keeps popping up continuously, uninstall the “MTP Device” by going to Start à Control Panel àSystem à Hardware à Device Manager (you computer may vary slightly, depending on Windows Version).
You may have to restart your computer after each of these methods to get them to work properly. Disconnect your Sansa player BEFORE shutting down your computer.
-Tha Mp3 Doctor

SOURCE: Sandisk Sansa e250r - cannot delete mp3 files

I have had this problem for some time now and finally got through to tech support for Sansa and now have the solution:Worked for both 230 and 240.
Take out the battery in the Sansa player; Put on lock on back side of Sansa player; Connect Sansa to the computer, Once computer recognizes device cancel out of that media program; Go to my computer on desk top; Right click on recognized Sansa device; Click format; Click ok to delete files.