Data back up is ALWAYS necessary on any PC or laptop.
Many home users never even consider backing up their valuable data - until they lose some. It can be very, very painful. All those pictures, that music, those documents - all gone. PC's are on the whole, very reliable but mechanical devices like hard drives do have a finite life and will fail eventually. Often though it is us humans that create the situation where we lose those valuable files.
We can recover data from corrupted drives but it is far better to start backing up your data to a safe place before anything happens rather than after the horse has bolted.
We can explain how back-ups work and advise you the best way to safeguard your data in your particular situation.
If you have lost data then we can also recover it for you.
Advice is always free.