I see such on amazon for 20 bucks or so. http://www.amazon.com/gp/product/B009PO32AM to be exact.
This usually fits what the Archos user was looking for. Drag and drop.
As to retrieving such, 4GB should be on your PC or other backup. Even DROPBOX gives you 5GB free so no good reason to not have a spare copy.
So I have an Archos 4GB MP3 player, it's small but it's always served me well, but recently I connected it to the USB port in the car and I noticed that I could only view about 30% of the songs. Then, after disconnecting it, I couldn't listen to anything because a song would start playing and then freeze. When I checked on a computer I discovered that the other 70% of music has seemingly vanished, or somehow been converted into mysterious files with no file extension and I can't open them with any program on my computer. The file names are really strange-looking symbols as well. I'm pretty sure those files are what became of the missing music - one is 2GB! - but I don't know how to retrieve them.
Has anyone experienced something like this before, or does anyone have any ideas how to fix it? I can get a new music player, but I'm just really annoyed.