Etrex10...killing me!

Hi,
I finally used my etrex10 for more than just an odometer and saved two tracks, roughly about 50klm each and maybe 8 waypoints.
Now every time I try to do anything it tells me my memory is dangerously low or I haven't enough memory for this function or to check my parameters.
I've tried everything I know to delete all that's on there but it either won't let me or it tells me I can't do THAT function either due to memory or parameters!!
I know its a very basic base model but I assume there would be more storage than that?
Any ideas before I hurl it of seacliff Bridge?
I finally used my etrex10 for more than just an odometer and saved two tracks, roughly about 50klm each and maybe 8 waypoints.
Now every time I try to do anything it tells me my memory is dangerously low or I haven't enough memory for this function or to check my parameters.
I've tried everything I know to delete all that's on there but it either won't let me or it tells me I can't do THAT function either due to memory or parameters!!
I know its a very basic base model but I assume there would be more storage than that?
Any ideas before I hurl it of seacliff Bridge?