I'm planning to use the Preferences library to store some information in my M5Core. At some point i will need to change the values I'm storing there and one of these values is a large chunk of an html page (over 20 kB). Changes won't be needed that often so I don't think I'll harm the flash memory. However, what's my best strategy for updating ? Just save the new key value ? Set the key to a Null String then save the new page ? Remove the key then recreate it ? Does it make any difference in the way the flash memory is managed ?

Thanks for your help,
Daniel