HELP my e250 2GB sansa sandisk

I tried to reformat and it quit working just says connected with arrows but will not refresh  Error code says cannot create a stable subkey under a volatile parent key  Have turned off and on 100 times both PC and MP3 have plugged into all the different USB ports 

Is you player a v1 or v2 model? How exactly did you attempt to format it?

If it’s a v1, this should be of interest to you.