Acer B1-810. My Windows 10 PC recognizes the tablet in MTP mode but reports that most of the folders are empty. It can't find most of my photos, any of my podcasts or any of my documents. ???

Multiple method, but USB probably easiest for multiple files:
How to Use USB to Transfer Files between Computer and an Android Tablet
If both have Bluetooth it's very easy/fast for just a few files.
http://www.dummies.com/how-to/content/how-to-use-bluetooth-to-transfer-files-between-a-c.html http://www.dummies.com/how-to/content/how-to-use-bluetooth-to-transfer-files-between-a-c.html%E2%80%8B
or just copy to an SD card

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

Do you have iTunes? Take a look at this Apple forum: https://discussions.apple.com/thread/1406326?threadID=1406326&tstart=0 AND: http://forums.macrumors.com/showthread.php?t=438970

The location of all the music on your Sansa is Clip+/Internal Memory/Music.

If the folder is empty, you should now think on which mode you you transfer the songs MTP or MSC. If you transfer songs on MTP, you can only see them on that mode and vice versa.

Try to check the current settings on your Sansa by going to MENU/SETTINGS/SYSTEM SETTINGS/USB MODE

Try changing the USB modes and check the folder again.

If songs are not showing on both modes, possible that the files are hidden or corrupted.

That is because XP was designed 10 years before you got your Tablet and there is no driver for it so as far as XP is concerned, it does not exist.
Sorry.

Samsung Player Is No Longer Detected By Windows XP, Vista, Emodio Or
Samsung Media Studio.
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When your computer doesn't recognize your Samsung MP3 player, programs
such as Samsung Media Studio (SMS), Emodio, Windows Media Player
(10 or 11) do not allow you to transfer files to your player.
In SMS and Emodio, the portable icon appears grayed out.
In Windows Media Player, you are prompted to connect a device.
Your PC may fail to recognize your player for a variety of reasons.
To begin troubleshooting, scroll down, and then click the operating
system your computer is currently running.
-------------------------------------------------------------------------
General Operating System Information
-------------------------------------------------------------------------
On Windows computers, Samsung MP3 players require at least Windows XP
Service Pack 2. If you have an older operating system such as Windows
2000 or Windows 98, your computer won't recognize your player until you
upgrade your PC to at least Windows XP Service Pack 2.
If your PC is running Linux or MAC, it will not recognize some MP3
players that support only MTP mode. However, it will recognize players
that support UMS mode and list them as mass storage devices.
The following Samsung MP3 players support UMS: YP-U1, YP-U2, YP-U3,
YP-U4, YP-U5, and YP-S2.
The following Samsung MP3 players support both MTP and UMS mode: YP-Z5
and YP-P3.
Windows Vista may fail to detect you device if the player is not
connected properly, Windows Media Player is not installed or has become
corrupted, Vista is unable to install the MTP drivers, or the MTP patch
is not installed.
You can check it out further by going to this website and entering the information about your player
http://www.samsung.com/us/support/#
Please rate me.

Sorry but there are no specific drivers on the CD for this player. I've had this player since '05 and was trying to get it installed under Windows Vista with only limited success. This player seems to work best with Win XP.

The c150 has two modes of operation MSC and MTP. In MSC mode Windows recognizes the player as a flash drive. You create folders using Windows Explorer just like you do on any hard drive and then copy your music files into the folders. The second mode (MTP) works with a music player such as Rhapsody or Windows Media Player (ver. 10 or higher). SanDisk bundled Rhapsody on their CD and I just installed it (today) on my Vista PC and it seems to work OK. Any files dropped on the player in MTP mode are invisible to the music player running in MSC mode. However, all files added to the player, regardless of the mode used, are visible as one big happy list when you use the player.

You set the mode you want to use before plugging the player into a USB port by going to "menu/settings/USB" on the player then choose either MSC or Auto Detect (defaults to MTP).

SanDisk has very little tech support info about this player on it's web site. I hope this is helpful.

The user manual wil lshow you how to switch your USB mode from MSC to MTP:
http://www.sandisk.com/assets/File/Downloads/user-guides/clip-usermanual.pdf

-Tha Mp3 Doctor

The minimum requirements of your Sansa E250 is Windows XP and above and Windows Media Player 10 and above.

If you're using Windows Media Player 10 or above, your Sansa E250 and its contents should appear on the right pane when you click on the "Sync" tab. You can right click on a song and select "Remove". The songs will be erased permanently from the player.

If your songs do not appear on Windows Media Player 10 or above, it is possible that your songs may have been saved on another mode.

Your Sansa E250 comes in 2 modes: MTP and MSC. Songs saved on one mode will not be seen by the other mode, and vice versa.

There are 2 ways to delete songs from your Sansa :
By browsing the folders containing the songs, or by formatting the player.

You can switch modes by navigating your device menu using the following:

Menu >> Settings >> USB Mode

Next, plug your player in your PC and open Windows Explorer. You should first set your Explorer to "Show hidden Files and Folders" by going to the "Tools" menu (located on menu lists on Windows Explorer window), then choosing "Folder Options", then enabling the "Show Hidden Files and Folders" radio button

Deleting Music files under MTP Mode:

1. Your player should appear as a Sansa icon in Explorer as a "Portable Audio Device". Double left-click this icon to browse the player.
2. You'll find a "PPI NAND" sub-folder. Again, double left-click on this sub-folder.
3. You'll find a series of sub-folders, one of which should be titled "Music". Double left-click this to open it.
4. Your music should appear as individual files or folders. Delete this to remove the file(s) from the player

Deleting Music files under MTP Mode:

1. Your player should appear as a Drive letter and entitled either as a "Removable Drive" or as "Sansa "
2. Double left-click on this drive letter to browse the player
3. You may find your music files immediately on this folder, or you'll find a series of sub-folders, one of which should be titled "Music". Double left-click this to open it and view your music files.
4. Delete the music files you want, and they should be removed from the player

Deleting files through Format:

1. Formatting the player erases all files in the player, and oftentimes this is the best option to ensure that all files are removed and any corruption eliminated. Also, it is best to format the player when in MSC mode.
2. When the appears as a drive letter (under MSC mode), right-click on that drive letter and select "Format". On the "Format" pop-up window, click "Start" to begin the format process.
3. Follow the on-screen prompts and safely remove the player from your PC when the "Format Complete" display appears.
4. Unplug the player from the PC and when the player is powered up, the message "No Files" should appear on the player's LCD screen
5. Switch the mode back to "MTP", or continue to use "MSC". Note: It is best to use "MTP" when you are transferring subscription music to the player.

I hope this helps. :)

Windows Media Player 11 not compatible with this player.

The device doesn't know if it is a MTP or MSC device - in one of these modes, it will not allow access to the music folder. unfortunately, there is no way to switch between these two modes in the menu settings. Go to Control Panel - Device Manager - find MTP Deivce and update driver.

solve your problem from my post:

http://amritbera.blogspot.com/2008/11/mtp-problem-solved.html