Ill prob try not to delete/write too often, once its got all my contacts, some useful apps (games-ahem), and mp3s, ill be pretty happy. no doubt most of the writing/reading will be with changing music lists, but theres no chance id be able to fill the mobile up with 20+gb's worth...

if old blocks for data fail, and the phone can detect them and write to a different block instead (would i need to install an app for making sure bad blocks are never written to again?) then the phone should last a fair while, especially when theres this much space available... thanks