How Much storeage is too little

[fred099]

Hi, i have just bought a O2 Orbit from O2, i think it is a great phone especially with the built in GPS and WIFI. I installed some software on it to have a look to see if i wanted to buy it, then uninstalled it. I have just installed TomTom 6 onto the Memory card but i am only left with 18Mb of storeage space on the phone. can anyone tell me how to get all my storeage space back, or does it not matter how much the orbit has left.

Thanks

Fred099
O2 Orbit, 1Gb MicroSD, TOMTOM6