Cycle race track lap counter

OK - something works. I can somehow create a storage and fill it up with data.
What does not work is removing it at runtime.

So how to erase and recreate a Storage file on runtime?

I can storage.eraseAll() but that would remove my code too.

I can

storage.write('name', [data], 0, large_value)

but that gives me

Uncaught Error: Unable to find or create file

even if I 'overwrite' my current file.

So I'll try to

storage.erase('name');
storage.compact(); // this seems to be necessary to actually free up the space
storage.write('name', [data], 0, large_value):

but run into errors too.

Is Storage buggy or am I doing something wrong here?