Yes it can save data prior reinstalling OS  You will need an external drive or Large enough drive for that. You can have detailed video here.   [URL]  
Hi Everyone I have a problem with my sisters Inspiron.  When you power it on.. The black screen with the dell logo comes up. It said something about a problem with the battery, so i purchased a new battery and installed it today. I have charged it up and nothing has changed, still the same issue. [IMAGE]  
Black screen - not loading up