Delete songs on M250 help

Is it possible to delete songs from the M250 without using WMP?  I would like to be able to load it via “drag and drop” and unload it by just deleteing the file from the MSC folder.  Also, I seem to have one set of songs that do not show up in the MSC folder but nonetheless are on the player, I want to get rid of them…help! 

You can delete files using MSC mode. I do that on my e200. SanDisk has videos here. If you cant see it on the player in MSC mode, try MTP. You should be able to find it. worse case scenario, you can format the player and reload all the songs by drag and drop, and you shouldnt run into the issue again.