Why BLOBs ?
What are BLOBs and what are they good for ? A BLOB is a binary large object. I.e. that this data is very large, big and unstructured. SQL is the main database for SharePoint where all data is stored. The proposal from Microsoft is to restrict the capacity of a SharePoint content library to 200MB. The reason for this is that the data can be handled better and the system remains on a high performance level. See more information here: https://technet.microsoft.com/de-de/library/cc298801.aspx.When the users get integrated into SharePoint and play around with it, the system is integrated deeper intoy our company and the data will grow. Users will perhaps put videos in SharePoint or other big data like large project oder Excel files. This makes the system slow and the performance will go down. The SQL Server can also get very big and blow up. Maybe the SQL Server is additionally used by other systems that need storage place and big SharePoint data can cut this and make other systems run slow, too. With SharePoint 2007 we used External Blob Storage, and with SharePoint 2010/2013 came the Remote Blob Storage.