What is more important: lost files or pay accidentally for renewing?


Sia's renewing system could be based on spending account dedicated only to spending sia for automatic files renewing. More important thing is to be alerted when spending account is running low --> I will lost my files.

This could be like dropbox with credit system, I have sia -> I have files. No sia -> no files.

"Sia money = time for files". How much time do I have for my uploaded files based on my spending account. When I upload more files it will show me less time. 

Then you can limit life of the files by simply limit funds in spending account.