Sansa Media Converter won't work

First you need the Sansa Media Converter, which you can get here.

To transfer videos and photos on your Sansa using the Sansa Media Converter, please follow these steps:

1. Click on the "Add Media" button on the upper right corner of the Sansa Media Converter window.
2. In the "Open" dialog box, locate the photos or videos that you want to transfer to your Sansa. Please read the supported file formats in the "See supported file formats" link in the Sansa Media Converter window.
3. Click on "Open" to add the photos or videos.
4. Click on the "Convert" button to transfer them to your Sansa in a supported and appropriate format.

To transfer photos and videos to your Sansa player, follow these steps:
1. Connect the Sansa player to your computer.
2. Select Converter using Sansa Media Converter on initial connection.
3. Click Add Media to select photo or video files to be converted.
4. The Sansa Media Converter will store all converted files in My Album. Click
the Album Name box and type in the name you want.
5. Click to start the conversion process. A status box will appear
showing which file(s) are being converted.

p.20 of manual:
Sansa Media Converter software lets you convert photos and videos as appropriate,
and then transfer them to your Sansa player. Sansa Media Converter offers
features such as cropping, rotating, and resizing before transferring them to your
player as well as the ability to transfer photo and video files to your microSD card.
Refer to the Sansa Media Converter software for file formats supported.
To transfer photos and videos to your Sansa player, follow these steps:
1. Connect the Sansa player to your computer.
2. Select Converter using Sansa Media Converter on initial connection.
3. Click Add Media to select photo or video files to be converted.
4. The Sansa Media Converter will store all converted files in My Album. Click
the Album Name box and type in the name you want.
5. Click to start the conversion process. A status box will appear
showing which file(s) are being converted.

p.20 of manual:
Sansa Media Converter software lets you convert photos and videos as appropriate,
and then transfer them to your Sansa player. Sansa Media Converter offers
features such as cropping, rotating, and resizing before transferring them to your
player as well as the ability to transfer photo and video files to your microSD card.
Refer to the Sansa Media Converter software for file formats supported.
To transfer photos and videos to your Sansa player, follow these steps:
1. Connect the Sansa player to your computer.
2. Select Converter using Sansa Media Converter on initial connection.
3. Click Add Media to select photo or video files to be converted.
4. The Sansa Media Converter will store all converted files in My Album. Click
the Album Name box and type in the name you want.
5. Click to start the conversion process. A status box will appear
showing which file(s) are being converted.

The Media Converter software will only recognize certain video types for conversion.
p.20 of manual:
Sansa Media Converter software lets you convert photos and videos as appropriate,
and then transfer them to your Sansa player. Sansa Media Converter offers
features such as cropping, rotating, and resizing before transferring them to your
player as well as the ability to transfer photo and video files to your microSD card.
Refer to the Sansa Media Converter software for file formats supported.
To transfer photos and videos to your Sansa player, follow these steps:
1. Connect the Sansa player to your computer.
2. Select Converter using Sansa Media Converter on initial connection.
3. Click Add Media to select photo or video files to be converted.
4. The Sansa Media Converter will store all converted files in My Album. Click
the Album Name box and type in the name you want.
5. Click to start the conversion process. A status box will appear
showing which file(s) are being converted.

the sansa media converter is only used for videos and pictures.
for song you go to my computer and u will see that it says sansa e260 you click on it then it will have files for music vieos pictures and recoding click on music and drag ur music on to it.

i don't know how to put videos on the sansa mp4 e260

p.20 of manual:
Sansa Media Converter software lets you convert photos and videos as appropriate,
and then transfer them to your Sansa player. Sansa Media Converter offers
features such as cropping, rotating, and resizing before transferring them to your
player as well as the ability to transfer photo and video files to your microSD card.
Refer to the Sansa Media Converter software for file formats supported.
To transfer photos and videos to your Sansa player, follow these steps:
1. Connect the Sansa player to your computer.
2. Select Converter using Sansa Media Converter on initial connection.
3. Click Add Media to select photo or video files to be converted.
4. The Sansa Media Converter will store all converted files in My Album. Click
the Album Name box and type in the name you want.
5. Click to start the conversion process. A status box will appear
showing which file(s) are being converted.

p.20 of manual:
Sansa Media Converter software lets you convert photos and videos as appropriate,
and then transfer them to your Sansa player. Sansa Media Converter offers
features such as cropping, rotating, and resizing before transferring them to your
player as well as the ability to transfer photo and video files to your microSD card.
Refer to the Sansa Media Converter software for file formats supported.
To transfer photos and videos to your Sansa player, follow these steps:
1. Connect the Sansa player to your computer.
2. Select Converter using Sansa Media Converter on initial connection.
3. Click Add Media to select photo or video files to be converted.
4. The Sansa Media Converter will store all converted files in My Album. Click
the Album Name box and type in the name you want.
5. Click to start the conversion process. A status box will appear
showing which file(s) are being converted.

Need new codecs, definitely.