Salesforce error STORAGE_LIMIT_EXCEEDED

When we try to do an operation in salesforce we can get this message:

Insert failed. First exception on row 0; first error: STORAGE_LIMIT_EXCEEDED, storage limit exceeded: [] 

An unexpected error has occurred. Your development organization has been notified.

This happens because we have reach the Salesforce limit for Storage. You can check it on :
Setup >> Storage Usage

My Case I had to clean some objects, so I run this script.


List<attachment> ListObjects =
    [SELECT id from attachment];

System.debug(
    ListObjects.size()
);

Database.delete(ListObjects, false);

ListObjects =
    [SELECT id from attachment];

System.debug(
    ListObjects.size()
);

Clean the Bin as well
Home >> Recycle Bin >> Empty Your organization's recycle bin