Added 2GB micro SD to Sansa e280, computer doesn't recognize
There are 3 ways to solve your problem, but all of them are rather kludgy. This is an old player and the integration of the microSD card is not done very well. I believe with the newer players these sorts of issues are not problems. Anyway, here are your 3 possibilities:
1) You can load your music directly onto the card before you put it into the player. Most cards come with an adapter that lets them fit into slots that are for regular SD cards. So if your computer has a slot for an SD card (or if not, you can plug the card into a card reader and then plug the card reader into the USB port on your computer) then you can copy and paste mp3 files onto the card. This is a drag because you can't use Windows Media Player to do this, but instead need to open the folder where the MP3 files are and then copy and paste them onto the card. But it works
2) This is slightly easier. Before you connect the Sansa player to the computer go to the settings part of the main menu and then select mode. You should see two choices. One is MTP and this is the setting you want if you are using the player with Rhapsody service. The other setting is MSC and this lets your computer recognize the Sansa player AND the microSD card. Once you have selected the MSC mode, then you can connect the player to your computer. When you look at the drives on your computer, you'll see 2 new drives. One is the Sansa 280 and the other is the microSD card. Once you see those, you can copy and past MP3 files right onto the card (and/or onto the Sansa). Again, you have to go the folder where your MP3 files live and cannot use WMP to do this
3) I haven't tried this, but others say that a free program called rockbox (www.rockbox.org) let's all this work much better. It sounds complicated, as it puts kind of a new operating system on your Sansa and it may not be reversible, so proceed with caution, but some people love it.
Hope that helps